Derrick Mason has retired as a member of the NFL's Baltimore Ravens after 15 years in the league. Mason played at Michigan State for Nick Saban from 1993-96 out of Detroit Mumford High School. The 38 year old wide receiver announced his decision Monday at the Ravens' training complex. Mason played 8 seasons with Tennessee before signing as a free agent with Baltimore in 2005. He never missed a game over six seasons with the Ravens and is the team career leader with 471 catches and 5,777 yards receiving. He also ranks 2nd with 29 touchdown catches.