Late game, great game. Arizona upset No. 18 Oklahoma State, 59-38, in Tucson, Ariz., on Saturday night. Here's how it happened:

It was over when: Arizona cornerback Jonathan McKnight picked off a pass from OSU quarterback Wes Lunt and returned it 48 yards for a touchdown. The Wildcats blitzed the true freshman and it paid off as Lunt threw off his back foot across the field, making it easy for McKnight to intercept the pass and cruise untouched into the endzone. OSU never recovered.

Game ball goes to: Matt Scott. The Wildcats senior quarterback was poised and efficient. He completed 28 of 41 pass attempts for 320 yards, two touchdowns and zero interceptions. He added 55 rushing yards and another score on the ground.

Stat of the Game: 15 OSU penalties for 167 yards. Those numbers defined the game for the Cowboys who made mental mistakes and dropped passes throughout the game. It's possible some Cowboy players will have to walk back to Stillwater.

Unsung hero: With 14 tackles, one forced fumble and one fumble recovered, Jake Fischer put his stamp on the game. The Wildcats junior linebacker was all over the field and relentless in his pursuit of OSU running backs and receivers.

Unsung hero, Part II: Once Scott softened up the Cowboys' defense through the air, running back Ka'Deem Carey exploited them on the ground. The sophomore finished with 26 carries for 125 yards and three touchdowns for the Wildcats. He added four catches for 28 yards and another score to account for four touchdowns on the night.

What it means: The Big 12 Conference's BCS profile takes a hit. A ranked Big 12 squad suffered a double-digit loss to an unranked Pac-12 foe, simple as that. For Arizona, it gives Rich Rodriguez a signature win early in his tenure. For OSU, it will be a long plane ride home as the Cowboys know they got in their own way on Saturday night.