Kolb has good size and build for a NFL quarterback and excels at throwing short to mid-range passes. He can throw the ball on the move and is a threat to run with the ball if necessary. Kolb is a great leader and has started for four years at Houston. He would be an ideal West Coast quarterback once he learned the system.
Kolb did not play in a pro style offense at Houston and would have to learn the NFL style of progression and reads. He is unlikely to become an elite vertical passer. He must work on improving his mechanics, as he has a tendency to wind up too much. Kolb has as tendency to go to a three quarters delivery that causes the ball to get batted down at the line of scrimmage.
Kolb was productive at Houston, but that was in a shotgun based, short throwing offense. He would have to take the time to learn the pro style offense, and his lack of arm strength will limit his ceiling. The question on Kolb will be if his success was due to the system or if he can mature into a solid NFL starter.