I think he just got demoralized by the injuries (several of which were not minor). Every time it seemed to be coming together for him, he would be knocked out for the season. I think the prospect of possibly getting hurt again after just a few games outweighed his desire to compete (particularly since he probably just more likely to be a backup). Too bad, despite what his critics say, IMO he could have a good one - now we will never know.On a day full of surprises, Locker's retirement announcement was very surprising, even if it took back seat to other news.
Top quarterback on the market just decides not to play anymore. Wow.
Retires at 26.