The sports betting site Bovada released its 2013 Heisman Trophy odds this week (only for entertainment purposes, of course), and it's no surprise that Texas A&M quarterback Johnny Manziel is atop the list. Never mind that Ohio State's Archie Griffin is the only player to have won two Heisman trophies (1974 and 1975). Manziel will go into the 2013 season as the guy to beat for college football's most prestigious individual award.