The San Francisco 49ers are down to three quarterbacks following Thad Lewis’s torn ACL. They likely will carry no more than three QBs on the roster during the regular season, but in the preseason, an extra arm is likely necessary. And considering the volume of throws in Chip Kelly’s offense, another arm would probably be welcome by the other three quarterbacks.
Any quarterback signing now knows their roster chances are relatively slim. We are through the first preseason game, so there are only three games left for a free agent to learn a new offense and get into game action.