Veteran NFL quarterback Trent Green has decided to retire, according to FOX Sports. Green played for five teams over his 15 seasons, and was often hampered by injuries. Concussions severely limited him in the latter stages of his career. "I feel this is finally the right time," Green said, according to the report. "I've talked about it with [the family] for a while, especially with the concussions over the last few years. We all felt it was the time to do it."