Michigan quarterback Devin Gardner (12) tries to evade Northwestern linebacker David Nwabuisi (33) during the second quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. (AP Photo/Tony Ding)

Northwestern quarterback Kain Colter (2) pitches the ball towards a running back during the first quarter of an NCAA college football game against Michigan, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. (AP Photo/Tony Ding)

Northwestern safetey Jared Carpenter, left, tries to stop Michigan running back Justice Hayes (5) in the first quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. (AP Photo/Tony Ding)

Northwestern quarterback Kain Colter (2) fumbles the ball as Michigan defensive tackle Jibreel Black (55) pressures in the second quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. (AP Photo/Tony Ding)

Michigan defensive back Raymon Taylor (6) fails to stop Northwestern wide receiver Cameron Dickerson (19) from making a touchdown reception in the second quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. (AP Photo/Tony Ding)

Michigan wide receiver Roy Roundtree (21) walks off the field to cheering fans after an NCAA college football game against Northwestern, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. Roundtree caught a 53-yard pass to put Michigan into position for a game-tying field goal. (AP Photo/Tony Ding)

Michigan head coach Brady Hoke walks off the field and waives to fans after an NCAA college football game against Northwestern, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan quarterback Devin Gardner, center left, celebrates with teammates after an NCAA college football game against Northwestern, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan safety Jordan Kovacs (11) breaks up a pass intended for Northwestern tight end Dan Vitale (40) during the fourth quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan tight end Devin Funchess (19) and the Northwestern bench react as Northwestern cornerback Demetrius Dugar (22) makes an interception in the fourth quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan quarterback Devin Gardner (12) reacts from the sideline during overtime of an NCAA college football game against Northwestern, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Northwestern running back Tyris Jones (3) is tackled by Michigan linebacker Kenny Demens (25) on the last play of overtime in an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan running back Fitzgerald Toussaint (28) holds up a hand to keep back Northwestern linebacker Damien Proby, right, as he rushes for a touchdown in the third quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Northwestern running back Venric Mark (5) rushes in the third quarter of an NCAA college football game against Michigan, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)

Michigan wide receiver Jeremy Gallon (10) makes a 42-yard reception under pressure from Northwestern defensive back Ibraheim Campbell (24) in the third quarter of an NCAA college football game, Saturday, Nov. 10, 2012, in Ann Arbor, Mich. Michigan won 38-31 in overtime. (AP Photo/Tony Ding)