Heisman Watch: Who is Leonard Fournette’s biggest challenger?By Gabe Encinas | Nov 2, 2015PrevPrev4 of 11NextNextOct 31, 2015; Lawrence, KS, USA; Oklahoma Sooners quarterback Baker Mayfield (6) throws a pass against the Kansas Jayhawks in the first half at Memorial Stadium. Mandatory Credit: John Rieger-USA TODAY SportsNext: Paxton LynchNextHome/American