Marshall was hurt taking a knee to the right side from the Cowboys' Barry Church following a reception in the second quarter. That happened moments after he made a spectacular 42-yard catch, juggling the ball with his right hand, to help set up a touchdown.
He stayed down for several minutes and gingerly walked off the field. He then headed to the locker room, and TV cameras showed him leaving Soldier Field in an ambulance.
Bears safety Chris Conte left the game in the third quarter with a back injury.
AP NFL website: www.pro32.ap.org and www.twitter.com/AP_NFL