Jonathan Stewart injury: Panthers RB leaves with knee injury

Carolina is down to an undrafted free agent after a series of injuries. Carolina Panthers running back Jonathan Stewart left the Sunday night game against the Pittsburgh Steelers with an apparent knee injury. Stewart was leading Carolina to its best drive of the second half when he gained a first down and was swarmed by several Steelers. The veteran running back was slow to get up and left the field gingerly before being taken to the locker room. He returned late in the third quarter, but it's u...