BOULDER, Colo. — Oklahoma entered Folsom Field with an aura of invincibility. What it left with wasn’t an aura as much as it was stench Saturday afternoon.

The third-ranked Sooners let a 17-point second-half lead fly off like a bald eagle soaring from the mountains that serve as the backdrop for Colorado’s home field.

Any chance of winning, or being able to control their own destiny in the national title race sailed away when Colorado kicker Kevin Eberhart hooked in a 45-yard field goal as time expired to give the Buffaloes a 27-24 victory and leave the Sooners befuddled.

Actually it was 8,000 Sooner fans that made the trip to Boulder that were shocked. OU entered Saturday’s Big 12 Conference opener with what many considered the best offense in college football. Averaging over 60 points through the first four games and winning all of them by more than five touchdowns breeds confidence.

The Sooners saw the writing on the wall much earlier.

“It’s never a shock when you’re the one competing,” OU coach Bob Stoops said while thousands of Colorado fans were going crazy on the field. “We needed to play well to win and we didn’t.”

The offense went from overpowering to overhyped, gaining just 230 yards, 330 less than their average.

Sam Bradford went from the biggest surprise in college football to the quarterback Sooner fans hoped he wouldn’t be. He was just 8-for-19 for 112 yards and threw two interceptions.

The receivers that ran wild throughout the non-conference season looked like they were in the same cage that contained Colorado’s mascot, Ralphie.

Juaquin Iglesias led the Sooners with two catches. Those grabs totaled 15 yards. Malcolm Kelly didn’t have a catch and only had a handful thrown his way.

“Colorado did a good job covering him up,” Bradford said. “Anytime we had a chance to throw to him one on one we take it but we didn’t get that chance today.”

Still, OU had chances to limp back home with an ugly win.

OU safety D.J. Wolfe picked off a pair of Cody Hawkins passes setting up a two touchdowns.

The first led to Bradford’s 13-yard touchdown pass to Iglesias late in the first quarter and gave OU a 7-0 lead.

The second came one play before Allen Patrick’s 17-yard touchdown run early in third quarter gave OU a 24-7 lead.