STILLWATER, OKLA. Bobby Pesavento threw a 21-yard touchdown pass in the fourth quarter and followed it with a 33-yard 2-point conversion pass, giving No. 25 Colorado a 22-19 victory over Oklahoma State on Saturday night.
Pesavento played the final 37 minutes in place of Craig Ochs, who left with an apparent foot injury, and directed two second-half scoring drives that allowed the Buffaloes (6-2, 4-1 Big 12) to overcome a 19-7 deficit.
Oklahoma State (2-6, 0-5) lost its fourth straight.
The game-winning touchdown drive started after the Buffaloes stuffed a running play up the middle on fourth and 1 from the Colorado 34. Bobby Purify then totaled 42 yards on three carries to move the ball to the OSU 24, and two plays later Pesavento found Graham for the touchdown.
The Buffaloes were hit with two unsportsmanlike conduct penalties after the touchdown, making the line of scrimmage the 33-yard line for the point-after try.
But Derek McCoy got open behind the coverage to catch the conversion pass.
Pesavento wound up 15-of-20 for 180 yards. Purify had 109 yards on 23 carries.
Colorado had closed to 19-14 on Marcus Houston's 16-yard touchdown run on the final play of the third quarter. It wouldn't have happened if Pesavento had not bowled over would-be tacklers to gain 16 yards on a third-and-15 scramble earlier in the drive.
Colorado started the second half by driving to the Oklahoma State 4, but came up short on a fourth-and-1 play. The Cowboys then used runs of 26 and 17 yards by Tatum Bell, and a 38-yard pass from split end John Wohlgemuth to John Lewis, to set up a short field goal that made it 19-7.
Colorado's first touchdown came on a 74-yard pass from Ochs to Matt Brunson, who ran through a tackle just across midfield and then went the distance. The play ended a drive that began at the 1-yard line Ochs had kept it alive with an 18-yard completion.