Dennis M. Mannion is currently CEO & President of House of 7, LLC, a sports advisory company with professional and amateur sports clients. Mannion was CEO and President of Palace Sports and Entertainment where he oversaw Business Operations of the

Detroit Pistons The Detroit Pistons are an American professional basketball team based in Detroit. The Pistons compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Central Division and play their home games at Li ...

The Palace of Auburn Hills The Palace of Auburn Hills, commonly referred to as the Palace, was a multi-purpose arena built in 1988 and located in Auburn Hills, Michigan. It was the home of the Detroit Pistons of the National Basketball Association (NBA), the Detroit Shoc ...

DTE Energy Music Theatre Pine Knob Music Theatre (formerly DTE Energy Music Theatre) is an outdoor amphitheater located in Independence Township, Michigan, approximately northwest of Detroit (it has a Clarkston, Michigan mailing address). Built by the Nederlander Organi ...

Meadow Brook Amphitheatre The Meadow Brook Amphitheatre (originally the Meadow Brook Music Festival) is an outdoor pavilion music venue, located at 3554 Walton Boulevard in Rochester Hills, Michigan on the campus of Oakland University. The venue seats 7,701 patrons with ...

, and Freedom Hill Amphitheatre. He has worked in all four Major League sports:

MLB 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), ...

NHL The National Hockey League (NHL; french: Ligue nationale de hockey—LNH, ) is a professional ice hockey league in North America comprising 32 teams—25 in the United States and 7 in Canada. It is considered to be the top ranked professional ...

NBA The National Basketball Association (NBA) is a professional basketball league in North America. The league is composed of 30 teams (29 in the United States and 1 in Canada) and is one of the major professional sports leagues in the United St ...

, and NFL.

Early career

After graduating college, Mannion began his sports management career 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), ...

, spending 16 years with 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) National League East, East division. Since 2004, the team's home sta ...

from 1982 to 1997. He would serve as Vice President of Marketing and Sales for eight seasons. Mannion left the Phillies in 1997 for a position as Senior Vice President of Ascent Sports in

Denver, Colorado 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 Unit ...

. There he handled business operations for the Accent-owned NHL

Colorado Avalanche The Colorado Avalanche (colloquially known as the Avs) are a professional ice hockey team based in Denver. They compete in the National Hockey League (NHL) as a member of the Central Division in the Western Conference. The Avalanche play thei ...

and NBA

Denver Nuggets The Denver Nuggets are an American professional basketball team based in Denver. The Nuggets compete in the National Basketball Association (NBA) as a member of the league's Western Conference Northwest Division. The team was founded as the D ...

. Mannion also worked on the movement of both teams games and operations to the newly built

Pepsi Center Ball Arena (formerly known as Pepsi Center) is a multi-purpose indoor arena located in Denver, Colorado. It is situated at Speer Boulevard, a main thoroughfare in downtown Denver, and is served by two nearby exits off Interstate 25. A light r ...

. He later worked in the NFL for the

Baltimore Ravens The Baltimore Ravens are a professional American football team based in Baltimore, Maryland. The Ravens compete in the National Football League (NFL) as a member club of the American Football Conference (AFC) North division. The team plays its ...

, serving eight seasons as Senior Vice President of Business Ventures from 1999 until 2007. In November 2007, he returned to baseball with the

Los Angeles Dodgers The Los Angeles Dodgers are an American professional baseball team based in Los Angeles. The Dodgers compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. Established in 1883 in the city of Brooklyn ...

. He served as Executive Vice-President and Chief Operating Officer from November 2007 until March 2009 when he was promoted to President and CEO. During his tenure, the Dodgers led the league in game attendance, set a World Record for the largest attended baseball game in 2008 at the

LA Coliseum The Los Angeles Memorial Coliseum (also known as the L.A. Coliseum) is a multi-purpose stadium in the Exposition Park, Los Angeles, Exposition Park neighborhood of Los Angeles, California. Conceived as a hallmark of civic pride, the Coliseum was ...

(119,000), hosted the 2009 World Baseball Classic championship rounds, and reached the

National League Championship Series The National League Championship Series (NLCS) is a best-of-seven playoff and one of two League Championship Series comprising the penultimate round of Major League Baseball's (MLB) postseason. It is contested by the winners of the two National ...

two consecutive years. With a pending change in ownership of the Dodgers organization, Mannion took the position with Palace Sports & Entertainment in 2011. Mannion’s role extended to all four PS&E operated properties – The Palace, DTE Energy Music Theatre, Meadow Brook Amphitheatre and Freedom Hill Amphitheatre.

Personal

A native of Pittsburgh, Pennsylvania, Mannion graduated from the

University of Massachusetts Amherst The University of Massachusetts Amherst (UMass Amherst, UMass) is a public research university in Amherst, Massachusetts and the sole public land-grant university in Commonwealth of Massachusetts. Founded in 1863 as an agricultural college, it ...

at the

Isenberg School of Management The Isenberg School of Management is the business school at the University of Massachusetts Amherst, the flagship campus for the University of Massachusetts system, located in Amherst, Massachusetts, Amherst, Massachusetts, United States. The Is ...

in 1981 with a bachelor's degree in Business and Sports Management. He received the “Distinguished Alumnus Award” from his alma mater in 1998.''University of Massachusetts Amherst website''
"VanderZwaag Award Winners"
Retired 27 June 2019. Mannion and wife Pam are the parents of five children.

References

{{DEFAULTSORT:Mannion, Dennis 1960 births Living people Baltimore Ravens executives Los Angeles Dodgers executives Philadelphia Phillies executives Isenberg School of Management alumni