TCU quarterback Trevone Boykin is coming off the performance of his career. Baylor quarterback Bryce Petty is coming off one he'd as soon forget.

Saturday in a clash of the Big 12's final unbeatens, Boykin will attempt to keep rolling. While Petty will try to bounce back from the worst statistical outing of his career.

"I was, for lack of a better word, terrible," Petty said. "I can't have games like that. I don't want games like that."

Petty wasn't "terrible." He did throw a pair of second-half touchdowns, as the Bears pulled away from Texas on the road, 28-7.

Still, even against a stingy Texas defense, it wasn't the yield of a Heisman hopeful, either. Petty completed just 7-of-22 passes for a career-low 111 yards as a starter. As a result, it was the first time with him as the starting quarterback Baylor had failed to score a first-half offensive touchdown.

"I feel like I'm the best in the country, so if you're going to be the best in the country, you've got to be able to decipher that kind of stuff and still be able to hit things," Petty said. "But some games are going to be like that. I've got a great team around me that consistently picks me up. I told everyone they make me look a lot better than I really am. At the end of the day, it wasn't my day."

The Bears will need Petty to be back at his best on Saturday. TCU jumped into the top 10 of the polls after toppling then fourth-ranked Sooners, 37-33. The Horned Frogs' defense was dominant late, holding the Oklahoma offense scoreless in the fourth quarter. TCU also made life difficult on Sooners quarterback Trevor Knight, who completed only 14 of 35 and passes. The Horned Frogs picked him off twice in the fourth quarter. The first, linebacker Paul Dawson returned 41 yards for a go-ahead touchdown. The second from safety Chris Hackett slammed the door on a late Oklahoma scoring chance.

"Defensively they are always tough," Petty said. "They are very well coached and seem to have a good plan going against us. But at the end of the day, it's all about us. So if we do the things we are supposed to do and execute well, starting with me, then the sky is the limit for this team and it doesn't really matter who we play."

The Horned Frogs have always been tough defensively under coach Gary Patterson. But through a revamped spread attack, they've been rejuvenated offensively. Thanks to new coordinators Doug Meacham and Sonny Cumbie. And thanks to Boykin, who might be as improved as any offensive player in the Big 12.

After a strong start to the season, Boykin broke out with a sensational showing against Oklahoma. He threw for 318 yards and two touchdowns, and rushed for 77.

"He was different from any time we've played him before," said Oklahoma defensive coordinator Mike Stoops. "He was much more controlled, calculated. I thought he was great.''

Boykin, who had bounced around at different positions his first two seasons, finished last year at wide receiver. He seemed destined to remain there, too, after Matt Joeckel transferred in from Texas A&M. But Boykin dedicated himself to the finer points of playing quarterback during the offseason. And he picked up the new offense more adeptly than anyone could have imagined.

"Coach Cumbie and Coach Meacham have done a great job of helping him mature and making him understand to try not to do too much," Patterson said. "A year ago, he tried to do it all by himself. But not this year. Our offensive line has done a really nice job of protecting him."

Before the Oklahoma game, the best performance of Boykin's career actually came against Baylor in 2012. After Casey Pachall abruptly left school, Boykin took over at quarterback. He passed for 261 yards and four touchdowns and rushed for 56 yards and another score, as TCU hammered the Bears 49-21 at Floyd Casey Stadium.

"Trevone was pretty good in that start against us," Baylor coach Art Briles said. "He's continued to grow as a football player and a quarterback. He's definitely a catalyst for them offensively without question."

Of course, despite the rough offensive outing in its previous game, this a different Baylor team, with Petty at quarterback, than the one two seasons ago.

But it's a completely different Boykin, too.

"I would say (my confidence) is off the charts right now," Boykin said. "We know our potential on the offensive side of the ball. ... we just need to keep it rolling."