"The Arizona Cardinals expect to lose running back Beanie Wells for at least a week, and possibly two, with a bone bruise in his right knee, a team source said Monday.

"Good news is it's not a surgical option," Cardinals coach Ken Whisenhunt said. "His knee is stable."

Wells suffered the injury during the second quarter of Sunday's 32-20 loss to the Pittsburgh Steelers. He was taken to the locker room with less than 2 minutes remaining in the first half and didn't return to the game, finishing with 12 carries for 42 yards."