Well it looks like we will be drafting very high again next year, and with our current staring QB being injured as much as he plays we may need to look a drafting a QB next year. Many people have different opinions on what makes a good pro QB from college, here is just one article I found that was very interesting in projecting QBs to the NFL.
The future NFL success of quarterbacks chosen in the first two rounds of the draft can be projected with a high degree of accuracy by using just two statistics from college: games started and completion percentage.
This theory was introduced in Pro Football Prospectus 2006 and further refined in Pro Football Prospectus 2007. The projection created by these stats is known as the Lewin Career Forecast, after the creator of the theory, David Lewin.
Scouts expected players such as Kyle Boller (48 percent), Jim Druckenmiller (54 percent) and Ryan Leaf (54 percent) to suddenly figure out how to complete passes once they hit the NFL. It isn't surprising that it didn't happen. Having a high completion percentage (above 60 percent or so) is no guarantee of success, especially if it was done in a small number of games in a fluky system (Tim Couch being a strong example), but it is a prerequisite for it. Games started are important because the more film that exists of a player in game conditions, the easier it is to find weaknesses that might come out against different opponents or different schemes. When scouts don't get sufficient information, they place too much weight on "measureables" and off-field workouts, and make mistakes like Couch (26 starters), Leaf (24 starts) or Akili Smith (19 starts).
The Lewin Career Forecast only applies to the first two rounds because it assumes that with enough game film to judge, scouts can accurate identify players who are "system quarterbacks" and will not succeed in the NFL, and those players appropriately fall on draft day (Colt Brennan being a good example from 2008).
From 1996-2005, the worst quarterback drafted in the top two rounds who had 37 or more college starts and a completion rate above 60 percent was Eli Manning. When the worst projection belongs to a quarterback who just led a two-minute drill to finish off a historic Super Bowl upset, that's a good projection system.