Dennis Mannion is President of The Detroit Pistons and Palace Sports & Entertainment. Mannion oversees all Detroit Pistons and Palace Sports & Entertainment business operations, including sales, marketing, finance and administration.

Mannion brings a broad and unique perspective to the Pistons. He spent 29 seasons working in four major professional sports, including two years managing business operations for the NBA's Denver Nuggets and the NHL's Colorado Avalanche from 1998 to 1999. Mannion most recently served as President of the Los Angeles Dodgers where he worked from 2007 to 2010. He also previously worked for the Baltimore Ravens from 1999 to 2007, and for the Philadelphia Phillies from 1982 to 1997.

Throughout his career Mannion has led operations during 12 post-season runs, including two World Series, an NHL conference championship and a Super Bowl.

In Los Angeles, Mannion's marketing initiatives and efforts to improve the game day experience helped the Dodgers lead Major League Baseball in paid attendance in 2009 for the first time since 1986. He also created the Dodgers Sports Lab, an in-house production facility and staff that generates content for all of the team's game broadcasts, motion graphics and video, online content and printed materials. Mannion joined the Dodgers in 2007 following eight seasons with the NFL's Baltimore Ravens where he was Senior Vice President of Business Ventures. In that role, Mannion oversaw all revenue streams, image, and brand-generating properties. He led and coordinated the development of more than 60 Ravens sub-brands, 12 season-long Ravens television and radio shows, and annual events such as Spring Football Festival, Ravens Kickoff Week, State of the Ravens, and the Ravens All Community Team.

Prior to joining the Ravens in 1999, Mannion spent three years as Senior Vice President at Ascent Sports, owner of the Denver Nuggets, the Colorado Avalanche and the Pepsi Center. Mannion managed all business operations for both teams and the arena.

Mannion spent 16 years with the Philadelphia Phillies from 1982-1997, serving as Vice President of Marketing and Sales for his last eight seasons. He was noted for enhancing the fan experience at Veterans Stadium during his tenure and was instrumental in securing and the staging the 1996 MLB All-Star Game in Philadelphia.

Mannion is a native of New York and graduated from the University of Massachusetts in 1981 with a bachelor's degree in business and sports management.