FILE - In this Nov. 25, 2017, file photo, Northwestern quarterback Clayton Thorson (18) looks for a receiver during the first half of the team's NCAA college football game against Illinois in Champaign, Ill. Thorson hopes to play in the opener at Purdue after last season ended with him getting carted off the field with a torn anterior cruciate ligament in his right knee. (AP Photo/Bradley Leeb, File)