Senior quarterback Tyler Donovan threw for one touchdown .
Senior quarterback Tyler Donovan scrambled for another as Wisconsin held off a fourth - quarter rally to upset Michigan ( No. 12 BCS , No. 13 AP ) 37 - 21 on Saturday .
Senior quarterback Tyler Donovan threw for one touchdown and scrambled for another as Wisconsin held off a fourth - quarter rally to upset Michigan ( No. 12 BCS , No. 13 AP ) 37 - 21 on Saturday .