Mathews' (knee) has been diagnosed with a sprained MCL, NFL.com reports. Mathews is expected to undergo an MRI on Monday, but his initial diagnosis is a sprained MCL. The running back was carted off the field during Sunday's game after being injury while trying to recover a fumble. For a player fresh off his first complete season last year, it appears Mathews is in store for a multi-week absence in wake of Sunday's latest injury. Expect more news surrounding Mathews' status for surface following his MRI results Monday.