While working for the Ravens organization he oversaw the development of TV and radio shows focusing on the team, expanded Ravens branding opportunities and revenue streams, and brought such events as the 2000 and 2007 Army-Navy Game to M&T Bank Stadium.
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Mannion holds the rare distinction of having experience in all four Major League sports: MLB, NHL, NBA, and NFL.
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Dennis M. Mannion is the President/CEO of Palace Sports and Entertainment for all Business Operations of the Detroit Pistons, The Palace of Auburn Hills, the DTE Energy Center, and the Meadowbrook Music Festival on the Oakland University campus.
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Mannion played a key role as well in bringing the 1996 MLB All-Star Game to Philadelphia.
Soon after Gores and Platinum Equity took ownership, the Pistons made several leadership changes including appointing Dennis Mannion to oversee operations of PS&E and the Pistons and Lawrence Frank as head coach of the Pistons.
Dennis Hopper | Dennis Quaid | Dennis the Menace | Dennis Rodman | Dennis Miller | Dennis Potter | Dennis Haysbert | Dennis the Menace (1959 TV series) | Dennis Kucinich | Dennis Morgan | Dennis Lillee | Dennis Dart | Dennis Prager | Dennis Oppenheim | Dennis Waterman | Dennis Green | Dennis Franchione | Dennis | Sandy Dennis | Hugh Dennis | Dennis Morgan (songwriter) | Dennis Lehane | Dennis Adams | Dennis Wilson | Dennis Wheatley | Dennis Tito | Dennis O'Keefe | Dennis Cooper | Dennis Christopher | Dennis Brown |