Video: Clayton Thorson Suffers Gruesome Knee Injury

Clayton Thorson suffered a knee injury.

Friday afternoon Northwestern took on Kentucky in the Music City Bowl. Down 7-3 in the first quarter, the Wildcats were driving when the team pulled out a trick play in which quarterback Clayton Thorson caught a pass down the sideline.

During the play, Thorson went down awkwardly and his right knee hyperextended.

He had to be taken off the field on a stretcher.

It's a brutal injury for the junior quarterback.

ESPN draft analyst Mel Kiper Jr. ranked Thorson as a top-five underclassman quarterback entering the 2017 season. Thorson is a former 4-star quarterback recruit from the 2014 class where he was the No. 9 pro-style QB.

Northwestern currently leads 10-7 midway through the second quarter.