Collin Klein piled up more than 300 yards of offense before leaving in the third quarter with an undisclosed injury, and Kansas State remained unbeaten with a 44-30 victory over Oklahoma State on Saturday night.
The Wildcats entered the weekend No. 2 in the BCS standings behind Alabama.
Klein had thrown for 245 yards and run for 64 more before sneaking in for his 50th career rushing touchdown with 9:47 left in the third quarter. The Heisman Trophy front-runner didn't return to the field on the Wildcats' next offensive series.
Oklahoma State's Wes Lunt also left with an injury after throwing his third interception in the third quarter. The freshman quarterback, who missed six weeks with a knee injury earlier this year, threw for 184 yards and a touchdown before giving way to Clint Chelf.
By that point, the Wildcats (9-0, 6-0 Big 12) simply had to protect a 38-17 lead.
Allen Chapman picked off three passes and returned one 29 yards for a touchdown, John Hubert had a pair of TD ru...