Green Bay Packers offensive lineman Don Barclay had to be carted off the field on Tuesday afternoon after a collision during practice.

The cart takes Don Barclay away, looks like he's hurting. Didn't catch the collision but would be a big loss for GB. pic.twitter.com/vgdy89uJhZ — Tyler Dunne (@TyDunne) August 5, 2014

Barclay reportedly collided with defensive lineman Julius Peppers and was seen favoring his right knee on his way off the field.

The loss would be a big one to the Packers' line depth. Barclay is capable of filling in at all five spots on the offensive line and was generally considered to be the proverbial sixth starter.