I disagree with the premise that he is better than most back-ups and some starters. He is not a good QB and he lasted as long as most below average back-ups lasts... 5 years. The real truth is, if it weren't for Harbaugh, Kap would have been out of the a few years ago. The NFL is not really a place for QBs that can't read a defense, can't go through progressions, has accuracy issues and is mistake prone. I don't have time to go through all the QB, but I would be willing to bet there are no QBs in the league that have more than 5 years of starting experience and less than a 60% career completion percentage. Derek Anderson maybe because his early years were really bad and he played for the Browns.