Diarmuid O'Sullivan
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Diarmuid O'Sullivan (born 27 July 1978) is an Irish
hurling Hurling (, ') is an outdoor Team sport, team game of ancient Gaelic culture, Gaelic Irish origin, played by men and women. One of Ireland's native Gaelic games, it shares a number of features with Gaelic football, such as the field and goa ...
coach and hurler who plays for Cork Premier Championship club
Cloyne Cloyne () is a small town located to the southeast of Midleton in eastern County Cork, Ireland. It is also a see city of the Anglican (Church of Ireland) Diocese of Cork, Cloyne and Ross, while also giving its name to a Roman Catholic dioce ...
. He played for the
Cork senior hurling team The Cork county hurling team represents Cork in hurling and is governed by Cork GAA, the county board of the Gaelic Athletic Association. The team competes in the three major annual inter-county competitions: the All-Ireland Senior Hurling Cha ...
for 12 years, during which time he usually lined out as a full-back. A fan favourite who was noted for his swashbuckling style during his inter-county career, O'Sullivan is considered a "Cork legend". O'Sullivan began his hurling career at club level with Cloyne, for whom his father Jerry O'Sullivan, had also played. He broke onto the club's top adult team as a 16-year-old in 1995 and enjoyed his greatest success two years later when the club won the 1997 Cork Intermediate Championship title and promotion. O'Sullivan has made 90 championship appearances in three different grades of hurling for the club, while his early prowess also saw him selected for the
Imokilly Imokilly () is one of the baronies of Ireland, an historical geographical unit of land. Its chief town is Youghal. It is one of 24 baronies in the county of Cork. Other neighbouring baronies include Barrymore to the west (whose chief town is ...
divisional team with whom he won the 1997 Cork Senior Championship. At inter-county level, O'Sullivan was part of the successful Cork under-21 team that won back-to-back All-Ireland Championships in
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
and
1998 1998 was designated as the ''International Year of the Ocean''. Events January * January 6 – The ''Lunar Prospector'' spacecraft is launched into orbit around the Moon, and later finds evidence for Lunar water, frozen water, in soil i ...
. He joined the Cork senior team in
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
. From his debut, O'Sullivan was ever-present as a defender and made a combined total of 110 National League and Championship appearances in a career that ended with his last game in
2008 2008 was designated as: *International Year of Languages *International Year of Planet Earth *International Year of the Potato *International Year of Sanitation The Great Recession, a worldwide recession which began in 2007, continued throu ...
. During that time he was part of three All-Ireland Championship-winning teams – in
1999 1999 was designated as the International Year of Older Persons. Events January * January 1 – The euro currency is established and the European Central Bank assumes its full powers. * January 3 – The Mars Polar Lander is launc ...
,
2004 2004 was designated as an International Year of Rice by the United Nations, and the International Year to Commemorate the Struggle Against Slavery and Its Abolition (by UNESCO). Events January * January 3 – Flash Airlines Flight 60 ...
and
2005 2005 was designated as the International Year for Sport and Physical Education and the International Year of Microcredit. The beginning of 2005 also marked the end of the International Decade of the World's Indigenous Peoples, Internationa ...
. O'Sullivan also secured five Munster Championship medals and a
National Hurling League The National Hurling League is an annual Inter county, inter-county hurling competition featuring teams from Ireland and England. Founded in 1925 by the Gaelic Athletic Association, it operates on a system of promotion and relegation within the l ...
medal as
captain Captain is a title, an appellative for the commanding officer of a military unit; the supreme leader or highest rank officer of a navy ship, merchant ship, aeroplane, spacecraft, or other vessel; or the commander of a port, fire or police depa ...
of the team. As a
dual player Dual player or dual star is a term used in Hiberno-English to describe someone who competes in multiple sports — for example, in Victorian Ireland, cricket and hurling. The term today in Gaelic games typically describes a male player who plays ...
at the highest level, he won a Munster Championship medal with the
Cork senior football team The Cork county football team represents Cork in men's Gaelic football and is governed by Cork GAA, the county board of the Gaelic Athletic Association. The team competes in the three major annual inter-county competitions; the All-Ireland Sen ...
in
2002 The effects of the September 11 attacks of the previous year had a significant impact on the affairs of 2002. The war on terror was a major political focus. Without settled international law, several nations engaged in anti-terror operation ...
. O'Sullivan announced his retirement from inter-county hurling on 12 May 2009, instead opting to transition to
rugby Rugby may refer to: Sport * Rugby football in many forms: ** Rugby union: 15 players per side *** American flag rugby *** Beach rugby *** Mini rugby *** Rugby sevens, 7 players per side *** Rugby tens, 10 players per side *** Snow rugby *** Tou ...
, where he had stints with Cork clubs Highfield and
Midleton Midleton (; , meaning "monastery at the weir") is a town in south-eastern County Cork, Ireland. It lies approximately 16 km east of Cork City on the Owenacurra River and the N25 road, which connects Cork to the port of Rosslare. A satelli ...
. O'Sullivan was named Young Hurler of the Year in 1999 while he also won his first
All-Star An all-star team is a group of people all having a high level of performance in their field. Originating in sports, it has since drifted into vernacular and has been borrowed heavily by the entertainment industry. Sports "All-star" as a sport ...
that year. He claimed a further three All-Stars in
2000 2000 was designated as the International Year for the Culture of Peace and the World Mathematics, Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tende ...
,
2004 2004 was designated as an International Year of Rice by the United Nations, and the International Year to Commemorate the Struggle Against Slavery and Its Abolition (by UNESCO). Events January * January 3 – Flash Airlines Flight 60 ...
and
2005 2005 was designated as the International Year for Sport and Physical Education and the International Year of Microcredit. The beginning of 2005 also marked the end of the International Decade of the World's Indigenous Peoples, Internationa ...
. At inter-provincial level, O'Sullivan was selected to play in five championship campaigns with
Munster Munster ( or ) is the largest of the four provinces of Ireland, located in the south west of the island. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" (). Following the Nor ...
, with his sole
Railway Cup The GAA Interprovincial Championship () or Railway Cup (''Corn an Iarnróid'') is the name of two annual Gaelic football and hurling competitions held between the provinces of Ireland. The Connacht, Leinster, Munster and Ulster GAA teams are co ...
medal being won in
2000 2000 was designated as the International Year for the Culture of Peace and the World Mathematics, Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tende ...
.


Early life

O'Sullivan was born in
Cork "Cork" or "CORK" may refer to: Materials * Cork (material), an impermeable buoyant plant product ** Stopper (plug), or "cork", a cylindrical or conical object used to seal a container *** Wine cork an item to seal or reseal wine Places Ireland * ...
and raised in
Cloyne Cloyne () is a small town located to the southeast of Midleton in eastern County Cork, Ireland. It is also a see city of the Anglican (Church of Ireland) Diocese of Cork, Cloyne and Ross, while also giving its name to a Roman Catholic dioce ...
in
East Cork East Cork lies in south-west Ireland, in Ireland's largest county, County Cork. The term "East Cork" is used in tourism, sporting and other contexts, and is the name given to one of eight municipal districts of Cork County Council. East Cork c ...
. His father, Jerry O'Sullivan, played with the Cloyne club from the 1960s until the 1990s before later serving as an administrator with the Cork County Board and the Munster Council. O'Sullivan's brother, Paudie, has also been a member of the Cork senior hurling team.


Playing career


Midleton CBS

During his secondary schooling at
Midleton CBS Secondary School Midleton CBS Secondary School is a Catholic secondary school for boys, located in Midleton, County Cork, Ireland. Midleton CBS was founded by the Congregation of Christian Brothers in 1867. History The Christian Brothers arrived in Midleton in ...
, O'Sullivan was more renowned as a
Gaelic football Gaelic football (; short name '')'', commonly known as simply Gaelic, GAA, or football, is an Irish team sport. A form of football, it is played between two teams of 15 players on a rectangular grass pitch. The objective of the sport is to score ...
er before joining the college's senior hurling team. On 26 March 1995, he was at right wing-forward on the Midleton CBS team that defeated Lismore CBS by 3-18 to 3-05 to win the Harty Cup title. O'Sullivan lined out on the Midleton CBS senior hurling team for a further two years. He later said: "I found Harty hurling much tougher than minor inter-county. The games were of an intensity that I had never previously encountered. You became aware very quickly of the standard required to compete and you had to adapt to the various styles played by schools from the different counties. It toughened me up a fair bit and stood to me in my later career with Cork."


Cloyne

O'Sullivan joined the
Cloyne Cloyne () is a small town located to the southeast of Midleton in eastern County Cork, Ireland. It is also a see city of the Anglican (Church of Ireland) Diocese of Cork, Cloyne and Ross, while also giving its name to a Roman Catholic dioce ...
club as a seven-year-old and played in all grades at juvenile and underage levels. Speaking of his first hurling appearance he said: "I went on not knowing what I was leaving myself in for but I knew when I came off I wanted more of it." O'Sullivan was first selected for the club's intermediate team in 1995. On 20 October 1996, O'Sullivan was at left wing-back when Cloyne drew with
Newtownshandrum Newtownshandrum () is a small village in County Cork, Republic of Ireland, Ireland located west of Charleville, County Cork, Charleville on the R515 road (Ireland), R515 road. The name translates from Irish to mean 'new town of the old ridge'. ...
in the final of the Cork Intermediate Championship. He lined out in the same position a fortnight later when Cloyne were defeated in the replay by 0-12 to 0-09. O'Sullivan lined out at left wing-back in his second successive final on 2 November 1997. A 1-12 to 1-07 defeat of Delanys secured the title and a Cork Intermediate Championship medal for O'Sullivan. On 31 October 2004, O'Sullivan was at right wing-back when Cloyne qualified to face
Na Piarsaigh Na Piarsaigh Hurling and Football Club is a Gaelic Athletic Association club in Fair Hill, Cork, Ireland. The club is affiliated to the Seandún Board and fields teams in both hurling and Gaelic football. History Located in the Fair Hill area ...
in the final of the Cork Senior Championship. He was switched to centre-back during the game and scored a point from as free, however, Cloyne were defeated by 0-17 to 0-10. Cloyne qualified for a second successive Cork Senior Championship final with Newtownshandrum providing the opposition on 16 October 2005. O'Sullivan lined out at centre-back in the 0-15 to 0-09 defeat. O'Sullivan was appointed captain of the Cloyne team for the 2006 championship, while he also took up a new position at centre-forward. On 22 October 2006, he captained the team when they were defeated by 2-19 to 3-14 by Erin's Own in the Cork Senior Hurling Championship final.


Imokilly

O'Sullivan had just turned 18 when he was first selected for the
Imokilly Imokilly () is one of the baronies of Ireland, an historical geographical unit of land. Its chief town is Youghal. It is one of 24 baronies in the county of Cork. Other neighbouring baronies include Barrymore to the west (whose chief town is ...
divisional team. He was a regular in the half-back line throughout the 1996 championship and was at left wing-back when Imokilly drew with Avondhu in the final on 22 September 1996. A fortnight later he was selected in the same position for the replay which Imokilly lost by 0-13 to 1-08. O'Sullivan was again selected at left wing-back the following year. On 5 October 1997, he won a Cork Senior Championship medal after a 1-18 to 2-12 defeat of Sarsfields in the final.


Cork


Minor and under-21

In spite of Harty Cup success as well as being added to the Cloyne intermediate team, O'Sullivan was disappointed not to be selected for the Cork minor team in 1995. He later said: "I was overlooked...it was a fair kick. I was disappointed. I suppose when you look back there's always some bit of politics. Somebody looking after their own." O'Sullivan was called up to the minor panel the following year, making his only appearance on 26 June 1996 in a 0-16 to 1-09 defeat by Tipperary in the
Munster Minor Hurling Championship The Munster GAA Hurling Minor Championship (known for sponsorship reasons as the Electric Ireland Munster GAA Hurling Minor Championship) is an annual Inter county, inter-county hurling competition organised by the Munster GAA, Munster Council of ...
. O'Sullivan subsequently progressed onto the Cork under-21 team and won a Munster Championship medal at full-back on 30 July 1997 following a 1-11 to 0-13 defeat of Tipperary. He was at full-back again for the subsequent 3-11 to 0-13 All-Ireland final defeat of
Galway Galway ( ; , ) is a City status in Ireland, city in (and the county town of) County Galway. It lies on the River Corrib between Lough Corrib and Galway Bay. It is the most populous settlement in the province of Connacht, the List of settleme ...
on 21 October. On 23 August 1998, O'Sullivan won a second successive Munster Championship medal after a 3-18 to 1-10 defeat of Tipperary in the final. He later won a second successive All-Ireland Championship medal at full-back on 20 September after a 2-15 to 2-10 defeat of Galway.


Senior

O'Sullivan was just eighteen-years-old when he made his first appearance for the Cork senior team on 23 March 1997. He was selected at left corner-back for the 4-21 to 2-11 defeat of Antrim in the
National Hurling League The National Hurling League is an annual Inter county, inter-county hurling competition featuring teams from Ireland and England. Founded in 1925 by the Gaelic Athletic Association, it operates on a system of promotion and relegation within the l ...
. O'Sullivan was later selected at left corner-back for Cork's 12-19 to 0-18 Munster Championship defeat by
Clare Clare may refer to: Places Antarctica * Clare Range, a mountain range in Victoria Land Australia * Clare, South Australia, a town in the Clare Valley * Clare Valley, South Australia Canada * Clare (electoral district), an electoral district * Cl ...
on 8 June. At the end of the season he was regarded as unlucky not to have been nominated for an
All-Star An all-star team is a group of people all having a high level of performance in their field. Originating in sports, it has since drifted into vernacular and has been borrowed heavily by the entertainment industry. Sports "All-star" as a sport ...
. O'Sullivan was appointed captain of the Cork senior team for the 1998 season. On 17 May 1998, he captained the team to the National League title following a 2-14 to 0-13 defeat of
Waterford Waterford ( ) is a City status in Ireland, city in County Waterford in the South-East Region, Ireland, south-east of Ireland. It is located within the Provinces of Ireland, province of Munster. The city is situated at the head of Waterford H ...
in the final. In 1999 O'Sullivan was switched to the full-back position for the championship. On 4 July, he won his first Munster Championship medal after a 1-15 to 0-14 defeat of reigning champions Clare. On 11 September, O'Sullivan was at full-back for the All-Ireland final against
Kilkenny Kilkenny ( , meaning 'church of Cainnech of Aghaboe, Cainnech'). is a city in County Kilkenny, Republic of Ireland, Ireland. It is located in the South-East Region, Ireland, South-East Region and in the Provinces of Ireland, province of Leinst ...
which Cork won by 0-12 to 0-11. He was later honoured with his first All-Star award, while he was also named as the Young Hurler of the Year. On 3 July 2000, O'Sullivan lined out in his second Munster final. He was described as "majestic" at full-back and was instrumental in saving a Tommy Dunne penalty in the 0-23 to 3-12 defeat of Tipperary. O'Sullivan ended the year with a second successive All-Star. On 5 May 2002, O'Sullivan scored a 65-metre free in Cork's 2-15 to 2-14 defeat by Kilkenny in the National League final. Later that season he became a
dual player Dual player or dual star is a term used in Hiberno-English to describe someone who competes in multiple sports — for example, in Victorian Ireland, cricket and hurling. The term today in Gaelic games typically describes a male player who plays ...
when he was selected for the Cork
Gaelic football Gaelic football (; short name '')'', commonly known as simply Gaelic, GAA, or football, is an Irish team sport. A form of football, it is played between two teams of 15 players on a rectangular grass pitch. The objective of the sport is to score ...
team. He made his first appearance at right corner-forward on 16 June in an 0-08 apiece draw with Kerry in the Munster Championship. O'Sullivan won a Munster Championship medal on 21 July after being introduced as a substitute in Cork's 1-23 to 0-07 defeat of Tipperary in the final replay. On 29 November, O'Sullivan and six of his teammates from the Cork hurling panel held a press conference at the Imperial Hotel to announce that all 30 members of the panel were withdrawing their services from the county in the hope of better treatment from the county board. He remained a high-profile representative at the negotiations over the following two weeks and was one of five Cork senior football representatives who agreed to a settlement with the county board on 13 December. O'Sullivan lined out in his third Munster final on 29 June 2003. As full-back he marked John Mullane but was substituted with
Mark Prendergast Mark Prendergast is a Scottish film, television and theatre actor. He is best known for his roles in BBC drama series ''Case Histories'', US TV series ''Outlander'' and the BAFTA winning feature film '' Running in Traffic''. On stage, Pren ...
after fifteen minutes. Cork won the game by 3-16 to 3-12 with O'Sullivan winning his third Munster Championship medal. On 14 September, he was at full-back for Cork's 1-14 to 1-11 All-Ireland final defeat by Kilkenny. O'Sullivan ended the season by being nominated for an All-Star, but lost out to Kilkenny's Noel Hickey for the full-back berth. On 27 June 2004, O'Sullivan lost his first Munster final when Waterford defeated Cork by 3-16 to 1-21. In spite of this defeat, Cork later qualified for the All-Ireland final against Kilkenny. A 0-17 to 0-09 victory gave O'Sullivan a second All-Ireland medal. He ended the season by being named in the full-back position on the All-Stars team. O'Sullivan won his fourth Munster Championship medal on 26 June 2005 after a 1-21 to 1-16 defeat of Tipperary in the final at
Páirc Uí Chaoimh Páirc Uí Chaoimh ( ) is a Gaelic games stadium in Cork, Ireland. Often referred to simply as "The Park", it is the home of Cork GAA and is located in Ballintemple, near the site of the original Cork Athletic Grounds. In February 2024, follo ...
. On 11 September 2005, Cork faced
Galway Galway ( ; , ) is a City status in Ireland, city in (and the county town of) County Galway. It lies on the River Corrib between Lough Corrib and Galway Bay. It is the most populous settlement in the province of Connacht, the List of settleme ...
in the All-Ireland final for the first time since
1990 Important events of 1990 include the Reunification of Germany and the unification of Yemen, the formal beginning of the Human Genome Project (finished in 2003), the launch of the Hubble Space Telescope, the separation of Namibia from South ...
. O'Sullivan was in his usual position of full-back, and proved effective in nullifying the threat of
Niall Healy Niall Healy (born 14 April 1985) is an Irish sportsperson. He plays hurling with his local club Craughwell and, from 2005, was involved at senior level with the Galway county team. Healy was top scorer in the 2015 galway senior hurling champ ...
who was substituted in the 56th minute. Cork won the game by 1-21 to 1-16, with O'Sullivan collecting a third All-Ireland medal. He ended the season by winning a second successive All-Star, his fourth overall, in the full-back position. On 25 June 2006, O'Sullivan won his fifth Munster Championship medal after a 2-14 to 1-14 defeat of Tipperary for the second consecutive year. Cork subsequently qualified for a fourth successive All-Ireland final, with Kilkenny providing the opposition for the third time. O'Sullivan received an early yellow card for an off-the-ball incident with
Martin Comerford Martin Timothy Comerford (born 9 November 1978) is an Irish hurler who played as a centre-forward for the Kilkenny senior team. Born in London, at an early age Comerford went to St. John's Boys' National School in Ballybough Street, Kilkenny ...
, while in the 29th minute he failed to deal with a high ball which bounced out of his hand towards
Aidan Fogarty Aidan Fogarty may refer to: * Aidan Fogarty (Kilkenny hurler) (born 1982) * Aidan Fogarty (Offaly hurler) (born 1958) {{hndis, Fogarty, Aidan ...
and a goal was conceded. Cork eventually lost the game by 1-16 to 1-13. He ended the season by being nominated for another All-Star, but lost out to J. J. Delaney. On 27 May 2007, O'Sullivan was at the centre of what came to be known as "Semplegate". Prior to the start of the Munster Championship meeting between Cork and Clare at
Semple Stadium FBD Semple Stadium is the home of hurling and Gaelic football for Tipperary GAA and for the province of Munster. Located in Thurles, County Tipperary, it is the second largest GAA stadium in Ireland (after Croke Park), with a capacity of 45,690 ...
, a number of players from both teams clashed as they emerged from the tunnel at the same time with the fighting spilling onto the pitch in front of a number of children who had formed a guard of honour. At a subsequent meeting of the
GAA Gaa may refer to: * Gaa language, a language of Nigeria * gaa, the ISO 639 code for the Ga language of Ghana GAA may stand for: Compounds * Glacial (water-free), acetic acid * Acid alpha-glucosidase, also known as glucosidase, alpha; acid, an e ...
's Central Hearings Committee, Cork players
Seán Óg Ó hAilpín Seán Óg Ó hAilpín (; born 22 May 1977) is a Fijian- Irish hurler and Gaelic footballer. In an inter-county playing career that spanned three decades, Ó hAilpín played for the Cork senior hurling and football teams, winning major honour ...
,
Donal Óg Cusack Donald is a Scottish masculine given name. It is derived from the Gaelic name ''Dòmhnall''.. This comes from the Proto-Celtic *''Dumno-ualos'' ("world-ruler" or "world-wielder"). The final -''d'' in ''Donald'' is partly derived from a misinterp ...
and O'Sullivan were served with a month-long suspension for their participation in the melee. The three players were later restored to the starting fifteen, however, Cork's championship campaign ended with an All-Ireland quarter-final replay defeat by Waterford. For the second time in six years, the Cork senior hurling team withdrew their services in sympathy with the Cork senior football team who had also refused to play due to the appointment of Teddy Holland as team manager and the changing of the rules regarding the selection committee. Because of this, O'Sullivan and his teammates failed to fulfil their opening two fixtures in the
2008 National Hurling League The 2008 National Hurling League, known for sponsorship reasons as the Allianz National Hurling League, was the 77th edition of the National Hurling League (NHL), an annual hurling competition for the GAA county teams. Tipperary won the league, ...
. He was reinstated at full-back for Cork's subsequent championship campaign, but received harsh criticism for his performances. On 10 August 2008, O'Sullivan played his last championship game for Cork in an All-Ireland semi-final defeat by Kilkenny. His "cameo of redemption" was praised, with the ''
Irish Times ''The Irish Times'' is an Irish daily broadsheet newspaper and online digital publication. It was launched on 29 March 1859. The editor is Ruadhán Mac Cormaic. It is published every day except Sundays. ''The Irish Times'' is Ireland's leading n ...
'' also describing O'Sullivan's performance as "his best display of the year". After the game O'Sullivan let emotions get the better of him and he was visibly distraught as he walked down the tunnel, gripping the crest on his jersey. O'Sullivan missed Cork's National League campaign in 2009 due to the players withdrawing their services for the third time in seven years. The third strike was particularly difficult for O'Sullivan as his father,
Jerry Jerry may refer to: Animals * Jerry (Grand National winner), racehorse, winner of the 1840 Grand National * Jerry (St Leger winner), racehorse, winner of 1824 St Leger Stakes Arts, entertainment, and media * Jerry (play), a 1914 American play ...
, was the chairman of the Cork County Board. On 12 May 2009, O'Sullivan announced his intention not to return to the Cork senior team for the championship. He later revealed that his decision was influenced by a new rule which made the wearing of helmets compulsory. O'Sullivan also revealed that he hinted to team manager Denis Walsh about a change of position from full-back. He stated: "After the game against Kilkenny last year, I didn't feel I could play again in the full back line. I told him this and I asked him if I could play a role somewhere else on the field and he said he would think about it. Which he did and he was honest and said he didn't think there was...I took a few hours to think about it but I had made up my mind after the Kilkenny game that full back was no more for me so I just had to stick by it."


Coaching career


Cork


Under-16

O'Sullivan began his inter-county coaching career in 2014 when he was appointed manager of the Cork under-16 development team. On 29 August 2015, he guided the team to an All-Ireland title after a 3-09 to 0-15 defeat of Kilkenny in the final at
Semple Stadium FBD Semple Stadium is the home of hurling and Gaelic football for Tipperary GAA and for the province of Munster. Located in Thurles, County Tipperary, it is the second largest GAA stadium in Ireland (after Croke Park), with a capacity of 45,690 ...
.


Senior

On 16 October 2015, O'Sullivan became a selector with the Cork senior team under Kieran Kingston. His first season as part of the management team saw Cork lose all five of their group stage games in the National League before narrowly avoiding relegation with a 2-22 to 0-25 defeat of Galway in a play-off. Cork's subsequent championship campaign ended with a first defeat by
Wexford Wexford ( ; archaic Yola dialect, Yola: ''Weiseforthe'') is the county town of County Wexford, Republic of Ireland, Ireland. Wexford lies on the south side of Wexford Harbour, the estuary of the River Slaney near the southeastern corner of the ...
in 60 years. O'Sullivan's second season as a selector saw Cork reach the National League quarter-finals where they faced a 1-20 to 1-18 defeat by
Limerick Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
. On 9 July 2017, he was part of the management team that saw Cork win the Munster Championship after a 1-25 to 1-20 defeat of Clare in the final.


Ballygiblin

In 2018, O'Sullivan joined the management of the Ballygiblin junior team as trainer. On 1 September, Ballygiblin defeated Shanballymore by 1-15 to 0-12 to win the North Cork Championship.


Career statistics


Club


Inter-county


Honours


As a player

;Midleton CBS *
Dr Harty Cup The Dr. Harty Cup is an annual inter-schools hurling competition organised by the Munster GAA, Munster PPS GAA division of the Gaelic Athletic Association (GAA). It has been contested every year, except on three occasions, since 1918. As the pin ...
(1): 1995 ;Cloyne *
Cork Intermediate Hurling Championship The Cork Intermediate A Hurling Championship (known for sponsorship reasons as the Co-Op Superstores Cork Intermediate A Hurling Championship and abbreviated to the Cork IAHC) is an annual hurling competition organised by the Cork County Board ...
(1):
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
;Imokilly *
Cork Senior Hurling Championship The Cork Premier Senior Hurling Championship (known for sponsorship reasons as the Co-Op Superstores Cork Premier Senior Hurling Championship and abbreviated to the Cork PSHC) is an annual club hurling competition organised by the Cork County B ...
(1):
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
;Cork *
All-Ireland Senior Hurling Championship The GAA Hurling All-Ireland Senior Championship, known simply as the All-Ireland Championship, is an annual Inter county, inter-county hurling competition organised by the Gaelic Athletic Association (GAA). It is the highest-tier competition for ...
(3):
1999 1999 was designated as the International Year of Older Persons. Events January * January 1 – The euro currency is established and the European Central Bank assumes its full powers. * January 3 – The Mars Polar Lander is launc ...
,
2004 2004 was designated as an International Year of Rice by the United Nations, and the International Year to Commemorate the Struggle Against Slavery and Its Abolition (by UNESCO). Events January * January 3 – Flash Airlines Flight 60 ...
,
2005 2005 was designated as the International Year for Sport and Physical Education and the International Year of Microcredit. The beginning of 2005 also marked the end of the International Decade of the World's Indigenous Peoples, Internationa ...
*
Munster Senior Hurling Championship The Munster GAA Hurling Senior Championship, known simply as the Munster Championship, is an annual Inter county, inter-county hurling competition organised by the Munster GAA, Munster Council of the Gaelic Athletic Association (GAA). It is the h ...
(5):
1999 1999 was designated as the International Year of Older Persons. Events January * January 1 – The euro currency is established and the European Central Bank assumes its full powers. * January 3 – The Mars Polar Lander is launc ...
,
2000 2000 was designated as the International Year for the Culture of Peace and the World Mathematics, Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tende ...
,
2003 2003 was designated by the United Nations as the International Year of Fresh water, Freshwater. In 2003, a Multi-National Force – Iraq, United States-led coalition 2003 invasion of Iraq, invaded Iraq, starting the Iraq War. Demographic ...
,
2005 2005 was designated as the International Year for Sport and Physical Education and the International Year of Microcredit. The beginning of 2005 also marked the end of the International Decade of the World's Indigenous Peoples, Internationa ...
,
2006 2006 was designated as the International Year of Deserts and Desertification. Events January * January 1– 4 – Russia temporarily cuts shipment of natural gas to Ukraine during a price dispute. * January 12 – A stampede during t ...
*
Munster Senior Football Championship The Munster Senior Football Championship, known simply as the Munster Championship and shortened to Munster SFC, is an annual inter-county Gaelic football competition organised by the Munster GAA, Munster Council of the Gaelic Athletic Associatio ...
(1):
2002 The effects of the September 11 attacks of the previous year had a significant impact on the affairs of 2002. The war on terror was a major political focus. Without settled international law, several nations engaged in anti-terror operation ...
*
Munster Junior Football Championship The Munster Junior Football Championship is a gaelic football tournament between the six counties of Munster GAA, Munster: Cork, Kerry, Limerick, Tipperary, Clare and Waterford. It is the third-tier county teams playing off in a single-elimination ...
(1): 2001 *
National Hurling League The National Hurling League is an annual Inter county, inter-county hurling competition featuring teams from Ireland and England. Founded in 1925 by the Gaelic Athletic Association, it operates on a system of promotion and relegation within the l ...
(1):
1998 1998 was designated as the ''International Year of the Ocean''. Events January * January 6 – The ''Lunar Prospector'' spacecraft is launched into orbit around the Moon, and later finds evidence for Lunar water, frozen water, in soil i ...
(c) *
All-Ireland Under-21 Hurling Championship The GAA Hurling Under-20 All-Ireland Championship (known for sponsorship reasons as the oneills.com GAA Hurling Under-20 All-Ireland Championship) is an annual inter-county hurling competition organised by the Gaelic Athletic Association (GAA). ...
(2):
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
,
1998 1998 was designated as the ''International Year of the Ocean''. Events January * January 6 – The ''Lunar Prospector'' spacecraft is launched into orbit around the Moon, and later finds evidence for Lunar water, frozen water, in soil i ...
*
Munster Under-21 Hurling Championship The Munster GAA Hurling Under-20 Championship, known simply as the Munster Under-20 Championship, is an annual inter-county hurling competition organised by the Munster Council of the Gaelic Athletic Association (GAA). It is the highest inter-c ...
(2):
1997 Events January * January 1 – The Emergency Alert System is introduced in the United States. * January 11 – Turkey threatens Cyprus on account of a deal to buy Russian S-300 missiles, prompting the Cypriot Missile Crisis. * January 1 ...
,
1998 1998 was designated as the ''International Year of the Ocean''. Events January * January 6 – The ''Lunar Prospector'' spacecraft is launched into orbit around the Moon, and later finds evidence for Lunar water, frozen water, in soil i ...
;Munster *
Railway Cup The GAA Interprovincial Championship () or Railway Cup (''Corn an Iarnróid'') is the name of two annual Gaelic football and hurling competitions held between the provinces of Ireland. The Connacht, Leinster, Munster and Ulster GAA teams are co ...
(1):
2000 2000 was designated as the International Year for the Culture of Peace and the World Mathematics, Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tende ...
;Individual * In May 2020, a public poll conducted by RTÉ.ie named O'Sullivan in the full-back line alongside Brians Lohan and Corcoran in a team of hurlers who had won All Stars during the era of ''
The Sunday Game ''The Sunday Game'' is RTÉ's main Gaelic games television programme. It is shown on RTÉ2 every Sunday during the Football Championship and Hurling Championship seasons. It is one of RTÉ2's longest-running shows, having been on air since 1 ...
''.


In management

;Ballygiblin *
North Cork Junior A Hurling Championship The North Cork Junior A Hurling Championship (known for sponsorship reasons as the Hibernian Hotel Junior A Hurling Championship and abbreviated to the North Cork JAHC) is an annual club hurling competition organised by the Avondhu GAA, North C ...
(1): 2018 ;Cork *
Munster Senior Hurling Championship The Munster GAA Hurling Senior Championship, known simply as the Munster Championship, is an annual Inter county, inter-county hurling competition organised by the Munster GAA, Munster Council of the Gaelic Athletic Association (GAA). It is the h ...
(1):
2017 2017 was designated as the International Year of Sustainable Tourism for Development by the United Nations General Assembly. Events January * January 1 – Istanbul nightclub shooting: A gunman dressed as Santa Claus opens fire at the ...
*All-Ireland Under-16 Hurling Tournament (1): 2015


References

{{DEFAULTSORT:Osullivan, Diarmuid 1978 births Living people All-Ireland Senior Hurling Championship winners Cloyne hurlers Cloyne Gaelic footballers Cork inter-county hurlers Cork inter-county Gaelic footballers Gaelic footballers who switched code Dual players Hurling managers Hurling selectors Munster inter-provincial hurlers People educated at Midleton CBS Secondary School GAA/GPA Young Hurlers of the Year