110 is AWFUL in college. His best season is 139, where he was 30th in the nation as a junior (interestingly, ahead of Russell), his soph season (110.29) he was 94th in the nation, last season he didn't qualify but his 120.55 would have put him 72nd.
He didn't improve and was barely keeping his job last season before getting hurt. While I don't put as much weight in stats as some people, 94th, 30th and 72nd in the nation in passing efficiency isn't a good trend and neither is not improving. His TD/INT ration is 36/33.
Some guys you watch, just know they stink and the stats bear that out, other guys you watch (like Andrew Walter) and you realize the stats lie and they won't be good in the NFL.
Look, I'm not right one everyone, I thought Eric Zeier and Cade McNown would be good. But the handy rule of stinking in college = stinking in the NFL is a pretty good one.
Still not sure what your criteria is. I mean his best season, he was ranked 28th in the nation in passing efficiency, ahead of bigger names such as Chris Leak, Kevin Kolb, Charlie Whitehurst, JaMarcus Russell, Reggie McNeal, Jay Cutler, and Matt Moore. You keep saying he didn't improve last season, but what do you expect when your team is decimated with injuries? Losing your top receivers isn't going to help you improve.
I mean if you're looking for a QB that threw for 5 TDs & 20 INTs and still starting then you're not gonna find one because they'll most likely be benched. The closest to awful is Matt Cassell who was benched in a 42-0 game because he kept turning the ball over but was drafted by the Patriots.... over Timmy Chang who set all kinds of records but wasn't.