St. Louis Rams quarterback Trent Green played 15 seasons in the NFL, but latterly concussions took their toll. St. Louis Rams quarterback Trent Green played 15 seasons in the NFL, but latterly concussions took their toll. (Jeff Roberson/Associated Press)

Former Pro Bowl quarterback Trent Green has decided to retire, according to an online report.

Green, who began his career with the San Diego Chargers in 1993, was released by the St. Louis Rams in February and has opted to retire after 15 NFL seasons, FOXSports.com reported Friday.

Green, 38, earned a Super Bowl ring with the Rams in 2000 and twice played in the Pro Bowl (2003, 2005) while with Kansas City, where he threw for more than 4,000 yards in three straight seasons. Severe concussions in 2006 and 2007 put Green's career in jeopardy, but he re-signed with the Rams last season.

Green told FOXSports.com he reached the decision after talking it over with his family, "especially with the concussions over the last few years. We all felt it was the time to do it."

Green also played four seasons in Washington with the Redskins.