Monday September 15th, 2014

San Diego Chargers running back Ryan Mathews has been diagnosed with a sprained MCL and could miss 4-5 weeks,'s Ian Rapoport reports.

Mathews, 26, was carted off the field during the fourth quarter of the Chargers' 30-21 victory over the Seattle Seahawks on Sunday. He was injured while recovering a fumble.

• Robert Griffin III dislocates ankle in loss to Jaguars

He had 11 carries for 31 yards and two catches for 26 yards before the injury.

The fifth-year running back had 1,255 rushing yards and six touchdowns last season for the Chargers. He has missed 10 games in his NFL career.

• Knowshon Moreno to miss at least four weeks with elbow injury

- Paul Palladino

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.