Sue Ogrocki / AP

With starter Zac Robinson injured and backup Alex Cate ineffective, Brandon Weeden took over in the second half and got the offense going for the Cowboys on Thursday against the Buffaloes.

“We all knew as a team that if we got that fourth down, we were going to score and seal the game. There was no hesitation, we were going for it,” said Hansen, who threw incomplete to Riar Geer on the play. “I was going to the sideline saying we’re going for it.”

Oklahoma State came right back on its next possession to take the lead on Toston’s 47-yard touchdown catch. Toston released out of the backfield, ran between two blitzing defenders and caught a short pass from Weeden before racing into the end zone for the go-ahead score.

Brian Lockridge answered with a 98-yard return for a touchdown on the ensuing kickoff to put the Buffaloes back ahead with 11:11 remaining, but Weeden responded with two big completions on third-and-long before finding Blackmon in the end zone as he scrambled to the right.

“Obviously, he’s blessed by his arm or he wouldn’t have been in pro baseball. He delivered some balls and we made some plays,” Brewer said.

It was only the second win for OSU against Colorado in the teams’ last eight meetings in Stillwater. Both teams ended up playing switcheroo at quarterback, with Cate getting a 7-0 head start when Perrish Cox brought back Matt DiLallo’s first punt 67 yards for a score.

OSU’s defense then sacked Hansen on back-to-back plays to force a three-and-out, but Toston took a handoff from Cate on the Cowboys’ first offensive snap and fumbled for the first time in 287 carries — a span of more than two years since he’d been benched for fumble problems in September 2007.

Hansen capitalized with a 5-yard touchdown pass to Scotty McKnight before leaving briefly with a thumb injury. Cody Hawkins, the former Buffaloes starter and the coach’s son, replaced him and threw a 5-yard score to Geer to put Colorado up 14-10 at halftime.

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