Eventough i don't like using this rating to measure how the QB has played, Matt Leainart's QB rating is 66 this year which puts him behind alot of these guys mentioned. Why would you use only one game as measure? He still doesn't have a TD this year despite 77 attempts. You can't win games in that way, playing afraid, trying to avoid picks. That's the feeling i get watching him play, he plays not to win and to rip of the defense, he just plays to avoid the pick, simply because he can't read the game and make the difficult throws. He can't light the offense up, as starter or a backup = fact. His rating yesterday after being as good as a starter with so many time out there is 33...
Matt Moore has double of the amount of attempts.. He has 8 TD's already.... His rate is 100 now... and he has 2 INT's.. Already a positive TD/INT ratio, something Leinart hasn't been able to do despite much more chances, time on the field, much better targets. Yes Matt Moore has won some games for them this year, contributed to the win ,rather than just managing the victory home. Now that's what QB's do, score to win the games.
Yes there is a reason that so many backups have low ratings, it's because most of them can't grasp the game. Some teams out there have few capable backups that can score, and that makes them more complete teams but also with better future.