Fullback Braden Wilson called the injury a "sad deal," and wide receiver Curry Sexton said he had "no doubts that you'll see Tre back out there next August."
Walker made 52 tackles and three tackles for loss while helping the third-ranked Wildcats to an 8-0 start. They're 5-0 in the Big 12 heading into Saturday's game against Oklahoma State.
Kansas State moved up to No. 2 in the BCS standings this week.