Broncos RB Willis McGahee to have MRI on injured knee

DENVER – Denver Broncos running back Willis McGahee tried to return to Sunday's game against San Diego after suffering a right knee injury in the second quarter.

McGahee went to the locker room to be examined by trainers. He returned to the sideline for extensive stretching on the training table, and he hopped on the stationary bike to try to get loose.

But with swelling that would not subside, the Broncos decided McGahee's day was done after 55 yards on seven carries. Broncos coach John Fox called the move "precautionary."

"We're concerned about everything. This is a week-to-week business and profession," Fox said. "We've got guys that we feel good about. We'd love to have Willis, and it's going to be a blow if we don't, but we feel good about the running back position."

McGahee will get an MRI on Monday to determine how severely injured his knee is and Fox would not speculate Sunday evening if McGahee would be able to play next week in Kansas City.

McGahee's locker was empty by the time the locker room was opened to reporters after Denver's 30-23 win.

Should McGahee be unable to play, rookie Ronnie Hillman could make his first career start. Hillman has emerged as McGahee's primary backup, though veteran Lance Ball had six carries and three catches Sunday against the Chargers. Former first-round draft pick Knowshon Moreno also could be in play for the first time since Sept. 17. Moreno has been a healthy scratch in the last eight games.