Peterson and the Heisman: What will happen if Oklahoma star running back Adrian Peterson, who is a freshman, wins the Heisman trophy? Specifically, what happens to the NFL's attempts to keep college underclassmen from entering the professional draft? After his poor showing this weekend, this topic may be less relevant, but it could come up, even if not this season. In fact, Mike Williams came very close to winning the trophy last year.One of the NFL's key arguments is that the rule protects younger players, whose bodies are not as developed, from...