Sure, the season has yet to really begin, but it's never too early for a Heisman watch. 5. Oklahoma QB Baker Mayfield: Can impress voters in a marquee "neutral-site" matchup against a legit Houston team. 4. Stanford RB Christian McCaffrey: Broke Barry Sanders' hallowed record last season and looks even faster now. 3. LSU RB Leonard Fournette: Can make an opening statement in front of Wisconsin fans that are used to strong ground games. 2. Florida State RB Dalvin Cook: Got my Heisman vote last year but could be in for even more this year. 1. Clemson QB Deshaun Watson: The most dynamic quarterback since Cam Newton, coming off the best title-game performance since Vince Young.