Rashad Jennings won't need surgery to repair his injured left knee, but an MRI on Monday revealed a sprained MCL, and Jennings is expected to miss at least a few weeks with the injury.

Rookie Andre Williams will take over in the meantime as the Giants' starting running back, with Peyton Hillis serving as his backup.

"We're all hoping this young man is a fast healer with the way he conditions himself and takes care of himself," Giants coach Tom Coughlin said of Jennings. "But we'll see."

Jennings is fourth in the NFL in rushing yards this year with 396 and third in carries with 91.