What almost nobody realizes about San Francisco back-up quarterback David Carr is this: He can play.
When the Panthers hired him in 2007, initially to back up Jake Delhomme, they had hoped they wouldn't have to play him until late in the season, if at all. Carr had been beaten up behind a terrible offensive line in Houston and was skittish when he came to Charlotte. Somebody would drop a pen during an interview and he'd jump.
Delhomme got hurt and Carr had to play and the result was disasterous. Carr didn't help by wearing color-coded wristbands. He was gone after the season.
Thing is, once the shock wore off, Carr proved he could play. He didn't get a chance in New York, backing up Eli Manning. He might get a chance with the 49ers.
Had he stuck around, he would have emerged as the starter for Carolina.