Top 10 QBs in college football

This year's QB class is one of the deepest in years. USA TODAY Sports

The 2013 rankings aren't quite as volatile as last year's were through four weeks, when the likes of Logan Thomas and Mike Glennon faltered early. Instead, many of the top QBs are the same one-quarter of the way into the season as they were in mid-August, albeit in a slightly different order. But the early returns for these passers are very good, as this year's class of signal-callers has the chance to make NFL evaluators quickly forget about last year's underperforming crop.

If you're new to the rankings, here's how I put them together: I rank the top 10 quarterbacks in the country based on two factors:

1. Productivity at the collegiate level.
2. Pro skills.

For each category, I rate the passers on a 1 to 10 scale.

The latter factor is important not just for each QB's chances to make it in the NFL, but also because quarterbacks who are capable of stretching and challenging a defense with pro-caliber throwing ability provide value to their teams' offenses that QBs with limited passing ability simply cannot.

A quarter of the way through the season, here are the top 10 quarterbacks in college football:

1. Teddy Bridgewater, Louisville Cardinals

College production: 9
NFL skills: 10

The Cardinals' quality of competition to start the season has been so bad it's cringe-worthy, but as is the case for the majority of elite players at the position, the challenge for Bridgewater is not his opponent but instead playing to his own capabilities. Outside of a slow start in the first half against Kentucky, when he didn't force the issue, Bridgewater has fed the highlight reel on nearly every drive.