Sports

Chargers RB Ryan Mathews has sprained MCL in right knee; McCoy won't put timetable on return

  • San Diego Chargers running back Ryan Mathews is helped after being injured during the second half of an NFL football game against the Seattle Seahawks, Sunday, Sept. 14, 2014, in San Diego. (AP Photo/Denis Poroy)

    San Diego Chargers running back Ryan Mathews is helped after being injured during the second half of an NFL football game against the Seattle Seahawks, Sunday, Sept. 14, 2014, in San Diego. (AP Photo/Denis Poroy)  (The Associated Press)

  • San Diego Chargers running back Ryan Mathews is carted off the field after being injured during the second half of an NFL football game against the Seattle Seahawks, Sunday, Sept. 14, 2014, in San Diego. (AP Photo/Denis Poroy)

    San Diego Chargers running back Ryan Mathews is carted off the field after being injured during the second half of an NFL football game against the Seattle Seahawks, Sunday, Sept. 14, 2014, in San Diego. (AP Photo/Denis Poroy)  (The Associated Press)

The San Diego Chargers say running back Ryan Mathews has a sprained medial collateral ligament in his right knee.

Coach Mike McCoy won't say how much time Mathews is expected to miss, other than "he'll be out for a little bit of time."

McCoy says every player heals differently and "I don't want to put a timetable on anything."

Mathews was taken off the field on a cart Sunday after hurting his knee trying to recover his own fumble in the fourth quarter of a 30-21 victory against the Seattle Seahawks.

Mathews is in the final year of his contract. Last year was the first time he played all 16 regular-season games. He gained a career-high 1,255 yards.

The Chargers (1-1) have Danny Woodhead, Donald Brown and rookie Branden Oliver at running back.

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