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John Dale Hammer (born July 12, 1994) is an American
professional baseball Professional baseball is organized baseball in which players are selected for their talents and are paid to play for a specific team or club system. It is played in leagues and associated farm teams throughout the world. Modern professiona ...
pitcher In baseball, the pitcher is the player who throws ("pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, who attempts to e ...
who is a free agent. In 2019 and 2021, he played in
Major League Baseball Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL) ...
(MLB) for the
Philadelphia Phillies The Philadelphia Phillies are an American professional baseball team based in Philadelphia. They compete in Major League Baseball (MLB) as a member of the National League (NL) East division. Since 2004, the team's home stadium has been Citize ...
. Hammer was born in
Fort Collins, Colorado Fort Collins is a List of municipalities in Colorado#Home rule municipality, home rule municipality that is the county seat and the List of municipalities in Colorado, most populous municipality of Larimer County, Colorado, United States. The ci ...
. He was the oldest of four children, all of whom helped with their parents' pizza business and played baseball. After graduating from Fort Collins High School, he joined the Navarro College baseball team as a
shortstop Shortstop, abbreviated SS, is the baseball or softball fielding position between second and third base, which is considered to be among the most demanding defensive positions. Historically the position was assigned to defensive specialists wh ...
. His coaches transitioned him into pitching, and he became the team's
ace An ace is a playing card, die or domino with a single pip. In the standard French deck, an ace has a single suit symbol (a heart, diamond, spade, or club) located in the middle of the card, sometimes large and decorated, especially in the ca ...
in 2014. Hammer spent two seasons with Navarro before continuing his
college baseball College baseball is baseball that is played on the intercollegiate level at institutions of higher education. In comparison to football and basketball, college competition in the United States plays a smaller role in developing professional pl ...
career with the
Marshall Thundering Herd The Marshall Thundering Herd is the intercollegiate athletic collection of teams that collectively represent the Marshall University in Huntington, West Virginia. Thundering Herd athletic teams compete in the Sun Belt Conference, which are membe ...
. After graduating from Marshall, the Rockies selected Hammer in the 24th round of the 2016 MLB Draft. While Hammer was playing in the Rockies' farm system, he was traded to the Phillies in exchange for Pat Neshek. He missed most of the 2018 season with an elbow injury but rose through the Phillies' minor leagues at the start of the 2019 season, making his MLB debut that May. Hammer was sent back down to Triple-A in July and remained there for the rest of the season. He did not play in 2020 due to the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identified ...
but returned to the Phillies
bullpen In baseball, the bullpen (or simply the pen) is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually wait in the bullpen if ...
in 2021. After being outrighted from Philadelphia's roster, Hammer re-signed with the team that drafted him before the 2022 season.


Early life

Hammer was born on July 12, 1994, in
Fort Collins, Colorado Fort Collins is a List of municipalities in Colorado#Home rule municipality, home rule municipality that is the county seat and the List of municipalities in Colorado, most populous municipality of Larimer County, Colorado, United States. The ci ...
, the oldest of four children born to Jason and Sindi Hammer, who owned a pizza franchise in the
Denver Denver () is a consolidated city and county, the capital, and most populous city of the U.S. state of Colorado. Its population was 715,522 at the 2020 census, a 19.22% increase since 2010. It is the 19th-most populous city in the United ...
area. In addition to helping with the family business, all of the Hammer children played baseball at the encouragement of their father, who had been a
shortstop Shortstop, abbreviated SS, is the baseball or softball fielding position between second and third base, which is considered to be among the most demanding defensive positions. Historically the position was assigned to defensive specialists wh ...
for
Lewis–Clark State College Lewis–Clark State College is a public college in the northwest United States, located in north central Idaho at Lewiston. Founded in 1893, it has an approximate annual enrollment of 3,600. The college offers more than 130 degrees and i ...
in Idaho. Hammer played two seasons of baseball at Fossil Ridge High School before transferring to Fort Collins High School in 2010. During his junior year, Hammer was a Second Team All-State selection after
hitting A strike is a directed physical attack with either a part of the human body or with an inanimate object (such as a weapon) intended to cause blunt trauma or penetrating trauma upon an opponent. There are many different varieties of strikes. A ...
.390 with eight
home run In baseball, a home run (abbreviated HR) is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home plate safely in one play without any errors being committed by the defensive team. A home run is ...
s.


College career

Hammer enrolled at Navarro College as a shortstop, but he did not do well as a hitter. His coaches offered him an option between becoming a
pitcher In baseball, the pitcher is the player who throws ("pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, who attempts to e ...
or being
redshirted Redshirt, in United States college athletics, is a delay or suspension of an athlete's participation in order to lengthen their period of eligibility. Typically, a student's athletic eligibility in a given sport is four seasons, aligning with the ...
, and he elected to pitch. He made 18 pitching appearances as a freshman in 2012, all of which came in relief, and went 2–0 with a 3.00
earned run average In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the numb ...
(ERA) and 35 strikeouts in 39 innings pitched. After gaining attention from coaches during the 2013
JUCO World Series The JUCO World Series is an annual baseball tournament held across three divisions of National Junior College Athletic Association baseball. Taking place in late May and early June each year, it determines the junior college baseball national champi ...
, in which Navarro was eliminated by
Palm Beach State College Palm Beach State College is a public college in Lake Worth, Florida. It is part of the Florida College System. Palm Beach State College enrolls nearly 27,000 students in over 100 programs of study including bachelor of applied science, associ ...
, Hammer became Navarro's
ace An ace is a playing card, die or domino with a single pip. In the standard French deck, an ace has a single suit symbol (a heart, diamond, spade, or club) located in the middle of the card, sometimes large and decorated, especially in the ca ...
in 2014. He became a starting pitcher that season, pitching his first
complete game In baseball, a complete game (CG) is the act of a pitcher pitching an entire game without the benefit of a relief pitcher. A pitcher who meets this criterion will be credited with a complete game regardless of the number of innings played—pit ...
on March 13. Hammer came close to pitching a
shutout In team sports, a shutout ( US) or clean sheet ( UK) is a game in which one team prevents the other from scoring any points. While possible in most major sports, they are highly improbable in some sports, such as basketball. Shutouts are usuall ...
, but Bossier Parish scored on an
error An error (from the Latin ''error'', meaning "wandering") is an action which is inaccurate or incorrect. In some usages, an error is synonymous with a mistake. The etymology derives from the Latin term 'errare', meaning 'to stray'. In statistic ...
from Navarro's center fielder, and the final score was 5–1. He went 5–1 with a 1.37 ERA during his sophomore season, striking out 58 batters in innings, and was named an All-Region XIV first team selection. Hammer left Navarro to join the
Marshall Thundering Herd The Marshall Thundering Herd is the intercollegiate athletic collection of teams that collectively represent the Marshall University in Huntington, West Virginia. Thundering Herd athletic teams compete in the Sun Belt Conference, which are membe ...
for the 2015 NCAA baseball season. He made his first start for the new team on February 27, striking out six batters and allowing six hits in seven innings, while Michael Taylor picked up the win in Marshall's 2–1 victory over the
Towson Tigers The Towson Tigers, formerly the ''Towson College Knights'', are the athletics teams of Towson University. All of the major athletic teams compete in the Colonial Athletic Association with 19 Division I athletic teams (13 in women's sports, 6 in ...
. He picked up his first win on April 18, striking out two and allowing one run on five hits in innings of the Herd's 5–1 win over Old Dominion. Hammer's next win came on May 9, when he set personal highs with 11 strikeouts in eight innings, allowing six hits and three walks as the Herd defeated the
Western Kentucky Hilltoppers The Western Kentucky Hilltoppers and Lady Toppers are the athletic teams that represent Western Kentucky University (WKU), located in Bowling Green, Kentucky, in intercollegiate sports as a member of the NCAA Division I ranks, competing in the Co ...
5–3. Hammer finished the 2015 season with a 2–6 record, 3.83 ERA, and one save in 15 appearances, 12 of which were starts, and he struck out 56 batters in a team-leading 80 innings. Hammer picked up his first win of the 2016 college baseball season on March 6, when he struck out nine batters and allowed three
earned run In baseball, an earned run is any run that was fully enabled by the offensive team's production in the face of competent play from the defensive team. Conversely, an unearned run is a run that would not have been scored without the aid of an err ...
s in six innings of a 12–6 victory over
Lehigh Lehigh may refer to: Places United States *Lehigh, Iowa *Lehigh, Kansas *Lehigh, Oklahoma *Lehigh, Barbour County, West Virginia *Lehigh, Wisconsin *Lehigh Acres, Florida *Lehigh Township (disambiguation) *Lehigh Valley, a region in eastern Penns ...
. The next week, he pitched a 7–2
complete game In baseball, a complete game (CG) is the act of a pitcher pitching an entire game without the benefit of a relief pitcher. A pitcher who meets this criterion will be credited with a complete game regardless of the number of innings played—pit ...
victory over
Brown Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model use ...
, carrying a
no-hitter In baseball, a no-hitter is a game in which a team was not able to record a hit. Major League Baseball (MLB) officially defines a no-hitter as a completed game in which a team that batted in at least nine innings recorded no hits. A pitcher w ...
through four innings before surrendering a
double A double is a look-alike or doppelgänger; one person or being that resembles another. Double, The Double or Dubble may also refer to: Film and television * Double (filmmaking), someone who substitutes for the credited actor of a character * Th ...
in the fifth. Hammer missed nine games with an upper body injury but finished the season 4–2 with a 4.88 ERA in 14 appearances, 11 of which were starts, and with 56 strikeouts in innings. Hammer appeared as a relief pitcher for Marshall in the semifinal round of the Conference USA baseball tournament, and despite holding the
Southern Miss Golden Eagles The Southern Miss Golden Eagles and Lady Eagles (also known as Southern Mississippi Golden Eagles and Lady Eagles) are the intercollegiate athletics teams that represent the University of Southern Mississippi (USM), located in Hattiesburg, Missi ...
scoreless in his outing, Marshall fell 3–2 and was eliminated from the postseason.


Professional career


Colorado Rockies organization (2016–2017)

The
Colorado Rockies The Colorado Rockies are an American professional baseball team based in Denver. The Rockies compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. The team plays its home baseball games at Coors Fi ...
of
Major League Baseball Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL) ...
(MLB), Hammer's hometown team, selected him in the 24th round, 710th overall, of the 2016 MLB Draft. He signed with the team for a bonus of only $1,000 and was assigned to the Rookie-level
Grand Junction Rockies The Grand Junction Jackalopes are an independent baseball team of the Pioneer League, which is not affiliated with Major League Baseball (MLB) but is an MLB Partner League. They are located in Grand Junction, Colorado, and play their home games ...
of the Pioneer League. The Grand Junction Rockies were managed at the time by Frank Gonzales, who had coached Hammer when he was in high school. Hammer made 27 Pioneer League appearances, all in relief, in his first season of professional baseball. He posted a 0–2 record and a 3.92 ERA while striking out 52 batters in innings. Hammer opened the 2017 baseball season as the designated closer for the Class A
Asheville Tourists The Asheville Tourists are a Minor League Baseball team of the South Atlantic League and the High-A affiliate of the Houston Astros. They are located in Asheville, North Carolina. Asheville teams have played under the Tourists moniker in differe ...
. After going 3–1 with a 1.08 ERA, 40 strikeouts, and six saves in his first 25 innings, he became one of six Tourists named to the
South Atlantic League The South Atlantic League, often informally called the Sally League, is a Minor League Baseball league with teams predominantly in states along the Atlantic coast of the United States from New York to Georgia. A Class A league for most of its ...
Mid-Season All-Star Team that June. He pitched five more innings, earning another win and striking out two more batters, before being called up to the
Class A-Advanced High-A (officially Class High-A, formerly known as Class A-Advanced, and sometimes abbreviated "A+" in writing) is the third-highest level of play in Minor League Baseball in the United States and Canada, below Triple-A and Double-A, and abov ...
Lancaster JetHawks The Lancaster JetHawks were a baseball team located in Lancaster, California. They were named for the city's association with the aerospace industry and played their home games at The Hangar. From 1996 to 2020, they were members of Minor League ...
. In 12 games there, Hammer went 0–1 with a 5.25 ERA, striking out 18 batters in 12 innings and converting six saves. Between the two teams, Hammer successfully converted 13 saves in 14 opportunities and averaged 13.9 strikeouts per nine innings (K/9).


Philadelphia Phillies (2017–2021)

On July 26, 2017, the
Philadelphia Phillies The Philadelphia Phillies are an American professional baseball team based in Philadelphia. They compete in Major League Baseball (MLB) as a member of the National League (NL) East division. Since 2004, the team's home stadium has been Citize ...
traded sidearm reliever Pat Neshek and cash to the Rockies in exchange for three prospects: Hammer, Alejandro Requena, and Jose Gomez. Hammer was assigned to the Class A-Advanced
Clearwater Threshers The Clearwater Threshers are a Minor League Baseball team of the Florida State League and the Single-A affiliate of the Philadelphia Phillies. They are located in Clearwater, Florida, and have played their home games at BayCare Ballpark since 20 ...
of the
Florida State League The Florida State League (FSL) is a Minor League Baseball league based in the state of Florida. Having been classified at various levels throughout its existence, it operated at Class A-Advanced from 1990 until its demotion to Single-A follow ...
(FSL), becoming a
bullpen In baseball, the bullpen (or simply the pen) is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually wait in the bullpen if ...
staple with a 2–0 record and a 0.57 ERA in 12 appearances. Hammer struck out 20 batters in FSL innings, issued only two walks, and held his opponents to a .154
batting average Batting average is a statistic in cricket, baseball, and softball that measures the performance of batters. The development of the baseball statistic was influenced by the cricket statistic. Cricket In cricket, a player's batting average i ...
. Impressed with his regular season performance, the Phillies sent Hammer to the
Arizona Fall League The Arizona Fall League (AFL) is an off-season sports league owned and operated by Major League Baseball (MLB) which operates during the autumn in Arizona, United States, at six different baseball complexes. Arizona Fall League rosters are fi ...
to continue working on his pitch mechanics as a member of the
Glendale Desert Dogs The Glendale Desert Dogs are a baseball team that plays in the West Division of the Arizona Fall League. They play their home games at Camelback Ranch in Glendale, Arizona. The ballpark is also the spring training facility of the Chicago White Sox ...
. In 10 appearances for Arizona, Hammer posted an ERA of 0.66, with 11 strikeouts in innings and only 0.805
walks plus hits per innings pitched In baseball statistics, walks plus hits per inning pitched (WHIP) is a sabermetric measurement of the number of baserunners a pitcher has allowed per inning pitched. WHIP is calculated by adding the number of walks and hits allowed and div ...
(WHIP). After starting the 2018 baseball season in extended
spring training Spring training is the preseason in Major League Baseball (MLB), a series of practices and exhibition games preceding the start of the regular season. Spring training allows new players to try out for roster and position spots, and gives estab ...
with the Phillies, Hammer reported back to Clearwater in June. He appeared in only three games, allowing three
earned run In baseball, an earned run is any run that was fully enabled by the offensive team's production in the face of competent play from the defensive team. Conversely, an unearned run is a run that would not have been scored without the aid of an err ...
s in innings before going on the
disabled list In Major League Baseball (MLB), the injured list (IL) is a method for teams to remove their injured players from the roster in order to summon healthy players. Before the 2019 season, it was known as the disabled list (DL). General guidelines ...
(DL). He spent most of the season on the DL with a strained elbow, appearing in only 12 games. Nine of those appearances were in relief for the Threshers, with whom he went 1–2 with a 2.79 ERA and struck out 12 batters in innings. The other three were quick outings with the
Gulf Coast League Phillies The Florida Complex League Phillies are a Rookie-level affiliate of the Philadelphia Phillies, competing in the Florida Complex League of Minor League Baseball. Prior to 2021, the team was known as the Gulf Coast League Phillies. The team plays ...
. Although he was not invited to spring training in 2019, Hammer did receive a promotion, starting the season with the Double-A
Reading Fightin' Phils The Reading Fightin Phils (also called the Reading Fightins) are a Minor League Baseball team based in Reading, Pennsylvania, playing in the Northeast Division of the Eastern League. The team plays their home games at FirstEnergy Stadium. The Re ...
. In 13 games and 21 innings there, Hammer went 1–0 with a 1.77 ERA. He made one appearance for the Triple-A
Lehigh Valley IronPigs The Lehigh Valley IronPigs are a Minor League Baseball team of the International League (IL) and the Triple-A affiliate of the Philadelphia Phillies. They are located in Allentown, Pennsylvania, and are named in reference to pig iron, used in th ...
as well, recording
outs In baseball, an out occurs when the umpire rules a batter or baserunner out. When a batter or runner is out, they lose their ability to score a run and must return to the dugout until their next turn at bat. When three outs are recorded in a ...
against all six batters he faced. When Pat Neshek was placed on the injured list on May 25, 2019, Hammer was called up to fill his place in the
bullpen In baseball, the bullpen (or simply the pen) is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually wait in the bullpen if ...
and on the 25-man roster. He made his MLB debut the following day, pitching a scoreless inning against the
Milwaukee Brewers The Milwaukee Brewers are an American professional baseball team based in Milwaukee. They compete in Major League Baseball (MLB) as a member club of the National League (NL) Central division. The Brewers are named for the city's association wi ...
by getting out
Christian Yelich Christian Stephen Yelich (born December 5, 1991) is an American professional baseball left fielder for the Milwaukee Brewers of Major League Baseball (MLB). He previously played for the Miami Marlins. The Marlins selected Yelich in the first r ...
,
Ryan Braun Ryan Joseph Braun (born November 17, 1983) is an American former professional baseball left fielder who played his entire career for the Milwaukee Brewers of Major League Baseball (MLB) from 2007 to 2020. Braun also played right field and fir ...
, and Mike Moustakas. Hammer played 20 games with the Phillies, during which he went 1–0 with a 3.79 ERA and 1.421 WHIP while striking out 13 batters in 19 innings. He was sent back down to the IronPigs on July 23, however, to prevent him from being overworked following his injury-shortened 2018 season. Upon his return, Hammer's
fastball The fastball is the most common type of pitch thrown by pitchers in baseball and softball. " Power pitchers," such as former American major leaguers Nolan Ryan and Roger Clemens, rely on speed to prevent the ball from being hit, and have t ...
velocity sharply declined with the rigors of a full season of professional baseball, and in his last 16 outings, he recorded a 14.49 ERA, .345
batting average against In baseball statistics, batting average against (denoted by BAA or AVG), also known as opponents' batting average (denoted by OBA), is a statistic that measures a pitcher's ability to prevent hits during official at bats. It can alternatively be ...
, and opposing batters had a 1.128
on-base plus slugging On-base plus slugging (OPS) is a sabermetric baseball statistic calculated as the sum of a player's on-base percentage and slugging percentage. The ability of a player both to get on base and to hit for power, two important offensive skills, ar ...
against him. Coupled with his earlier appearance, Hammer went 2–2 with a 12.64 ERA in 17 games for Lehigh Valley, striking out 16 batters in innings. Recognizing that his declining pitch velocity and the lack of
breaking ball In baseball, a breaking ball is a pitch that does not travel straight as it approaches the batter; it will have sideways or downward motion on it, sometimes both (see slider). A breaking ball is not a specific pitch by that name, but is any p ...
s in his pitch repertoire had affected his performance, Hammer spent the 2019–20 offseason weightlifting and developing his
slider Slider or Sliders may refer to: Arts * K.K. Slider, a fictional character within the ''Animal Crossing'' franchise * ''The Slider'', a 1972 album by T. Rex * ''Sliders'' (TV series), an American science fiction and fantasy television series * S ...
and
curveball In baseball and softball, the curveball is a type of pitch thrown with a characteristic grip and hand movement that imparts forward spin to the ball, causing it to dive as it approaches the plate. Varieties of curveball include the 12–6 curv ...
. He was sent to Triple-A that February, but on June 30, Minor League Baseball responded to the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identified ...
by cancelling the season. Every team was afforded a 60-player pool, of which 30 were on the major league roster and the other 30 practiced an at alternate training site instead of playing in minor league games. Hammer was included in the alternate training site player pool, and he spent the entirety of the abbreviated season training in Lehigh Valley. Hammer opened the 2021 season with the IronPigs, posting a 1.74 ERA and striking out 33 batters in innings before he was called up to Philadelphia on July 10. He made his season debut that day against the
Boston Red Sox The Boston Red Sox are an American professional baseball team based in Boston. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) East division. Founded in as one of the American League's eig ...
, loading the bases on a
hit by pitch In baseball, hit by pitch (HBP) is an event in which a batter or his clothing or equipment (other than his bat) is struck directly by a pitch from the pitcher; the batter is called a hit batsman (HB). A hit batsman is awarded first base, provided ...
, a single and a
walk Walking (also known as ambulation) is one of the main gaits of terrestrial locomotion among legged animals. Walking is typically slower than running and other gaits. Walking is defined by an 'inverted pendulum' gait in which the body vaults ov ...
before retiring the next three batters to escape the inning without allowing a run. Hammer appeared in 20 major league games during the 2021 season, recording a 4.95 ERA and striking out 22 batters in 20 innings. On November 5, 2021, the Phillies attempted to outright Hammer off of the 40-man roster, but he opted for
free agency In professional sports, a free agent is a player who is eligible to sign with other clubs or franchises; i.e., not under contract to any specific team. The term is also used in reference to a player who is under contract at present but who is a ...
instead.


Second stint with Colorado (2022–present)

On December 1, 2021, Hammer signed a minor league contract with the Rockies to rejoin the team that drafted him. Following the 2021–22 MLB lockout, Hammer was one of ten non-roster players that the Rockies invited to a condensed spring training. He was assigned to the
Albuquerque Isotopes The Albuquerque Isotopes are a Minor League Baseball team of the Pacific Coast League and the Triple-A affiliate of the Colorado Rockies. They play home games at Rio Grande Credit Union Field at Isotopes Park in Albuquerque, New Mexico, at an ...
, the Triple-A affiliate of the Rockies, to begin the season. The assignment reunited Hammer with his high school baseball coach Frank Gonzales, who had since taken a job as pitching coach for the Isotopes. He spent the entire season in Albuquerque. In 53 appearances for the Isotopes, all of which came in relief, Hammer was 1–1 with a 5.94 ERA. He struck out 47 batters in 47 innings. He elected free agency on November 10, 2022.


Pitching style

During the 2021 season, Hammer threw three pitches: a
fastball The fastball is the most common type of pitch thrown by pitchers in baseball and softball. " Power pitchers," such as former American major leaguers Nolan Ryan and Roger Clemens, rely on speed to prevent the ball from being hit, and have t ...
with an average velocity of , which he threw 61 percent of the time, and an
slider Slider or Sliders may refer to: Arts * K.K. Slider, a fictional character within the ''Animal Crossing'' franchise * ''The Slider'', a 1972 album by T. Rex * ''Sliders'' (TV series), an American science fiction and fantasy television series * S ...
and
curveball In baseball and softball, the curveball is a type of pitch thrown with a characteristic grip and hand movement that imparts forward spin to the ball, causing it to dive as it approaches the plate. Varieties of curveball include the 12–6 curv ...
as his
breaking ball In baseball, a breaking ball is a pitch that does not travel straight as it approaches the batter; it will have sideways or downward motion on it, sometimes both (see slider). A breaking ball is not a specific pitch by that name, but is any p ...
s. He added the slider early in the 2019 season, before his first MLB recall, and has also used a
changeup A changeup is a type of pitch in baseball and fastpitch softball. The changeup is a staple off-speed pitch often used in a pitcher's arsenal, usually thrown to look like a fastball but arriving much more slowly to the plate. Its reduced speed ...
. Hammer credits his minor-league elbow injury with teaching him "that I need to take better care of my body and how to prepare and not just go out there and throw".


Personal life

Hammer is known for the thick black plastic glasses that he wears when pitching, which have been compared to the glasses that
Charlie Sheen Carlos Irwin Estévez (born September 3, 1965), known professionally as Charlie Sheen, is an American actor. He has appeared in films such as ''Platoon'' (1986), ''Wall Street'' (1987), '' Young Guns'' (1988), '' The Rookie'' (1990), '' The Th ...
's character Ricky "Wild Thing" Vaughn wears in the 1989 baseball film '' Major League''. He began wearing them during the 2017 season after his poor vision prevented him from reading the
signs Signs may refer to: * ''Signs'' (2002 film), a 2002 film by M. Night Shyamalan * ''Signs'' (TV series) (Polish: ''Znaki'') is a 2018 Polish-language television series * ''Signs'' (journal), a journal of women's studies *Signs (band), an American ...
indicating which pitches his
catcher Catcher is a position in baseball and softball. When a batter takes their turn to hit, the catcher crouches behind home plate, in front of the (home) umpire, and receives the ball from the pitcher. In addition to this primary duty, the catcher ...
was calling for him to throw. As his parents' firstborn, Hammer was named John Dale after both of his grandfathers, but primarily goes by his initials because his parents thought that "J. D. Hammer" was a " seball name". He has two younger brothers, Garrett and Kalen, and a sister named Brenli. Garrett Hammer played baseball for Rocky Mountain High School,
Kellogg Community College Kellogg Community College (KCC) is a public community college based in Battle Creek, Michigan, with sites in Battle Creek, Albion, Coldwater, Hastings and in the Fort Custer Industrial Park. It serves approximately 8,400 students annually via f ...
, and
New Mexico Highlands University New Mexico Highlands University (NMHU) is a public university in Las Vegas, New Mexico. Founded in 1893, it has satellite campuses in Santa Fe, Albuquerque, Rio Rancho, Farmington and Roswell. NMHU has an average annual enrollment of approximate ...
.


References


External links

* {{DEFAULTSORT:Hammer, J. D. 1994 births Living people Albuquerque Isotopes players Asheville Tourists players Baseball players from Colorado Clearwater Threshers players Glendale Desert Dogs players Grand Junction Rockies players Florida Complex League Phillies players Lancaster JetHawks players Lehigh Valley IronPigs players Major League Baseball pitchers Marshall Thundering Herd baseball players Navarro Bulldogs baseball players Philadelphia Phillies players Reading Fightin Phils players Sportspeople from Fort Collins, Colorado