PASADENA, Calif. (AP) -UCLA quarterback Ben Olson was shaky and shoddy at times in his first game against BYU, the team where he once redshirted and was pegged as the program's savior.

But a pair of running backs and two defensive stands got him a win.

Chris Markey ran for a late touchdown, Trey Brown returned an interception 56 yards for an early score and No. 13 UCLA's defense held off a second-half BYU rally Saturday for a 27-17 victory.

Kahlil Bell also ran for a short touchdown in the first half as the Bruins (2-0) halted an 11-game winning streak by BYU (1-1).

Most of the pre-game attention in both Provo and Pasadena was on Olson, who left BYU to serve a Mormon church mission after redshirting his freshman season in 2002. When he returned, he transferred to UCLA.

Coming off a five-touchdown pass performance against Stanford in the Bruins' opener, Olson was just 13-for-28 for 126 yards with no touchdowns and an interception.

He had a similarly stellar start last year, then struggled over the next four games before going out with a knee injury.

UCLA coach Karl Dorrell said his 24-year-old - but still largely inexperienced - quarterback is ``growing up game by game.''

``As we were walking back to the locker room after the game, Ben Olson said, 'I could have played a lot better, coach,''' Dorrell said. ``I know Olson is the leader of our team, and I'm pleased with that.''

Down 20-3, BYU opened the second half with a pair of touchdown drives, but the UCLA defense forced a fumble on the ensuing possession and held the Cougars to three-and-out on the next.

``Our defense really dug in their heels,'' Dorrell said. ``We rose up in the fourth quarter to keep on top.''

UCLA used a methodical 45-yard drive in the final three minutes that included a pass interference penalty on BYU and an Olson completion on third-and-7. Markey's 3-yard touchdown run with 1:12 remaining sealed the win.

``We had a good score that we came up with when we needed it,'' Olson said.

Much of the game, Olson was outplayed by BYU quarterback Max Hall, who also served a mission and came to the starting job last week, after not taking a snap for three years.

A redshirt sophomore who transferred from Arizona State, Hall threw for 380 yards and two touchdowns. He also was intercepted once and lost a fumble.

After BYU was held to a field goal in the first half, Hall opened the second with a pair of touchdown drives. He completed passes of 18 and 23 yards and followed with a 28-yarder to Andrew George that took the Cougars to the UCLA 2.

Two short runs and a false start penalty followed, then Hall threw a 6-yard touchdown pass to Austin Collie to pull within 20-10.

Kayle Buchanan intercepted Olson on the next possession. After Harvey Unga broke a pair of tackles for a 24-yard run, Hall threw a 16-yard touchdown pass, laying the ball perfectly into the path of Collie in the back of the end zone.

``I had to grow up a lot in this game,'' Hall said. ``I think the whole team did, just to fight back and put ourselves in position to win the game. Now I just think the next step is winning it.''

Hall was leading the Cougars on what looked like their third straight scoring drive when he fumbled on a Bruce Davis sack. Tom Blake recovered at the UCLA 19.

UCLA forced a three-and-out on BYU's next possession.

``They are big, and we heard last week they claimed we are soft,'' Davis said. ``I think if you ask their quarterback tonight or tomorrow, he knows better than that.''

The Bruins won despite being outgained by the Cougars, 435-236.

Brown picked off a Hall pass across the middle and zig-zagged his way into the end zone to put UCLA up 10-0 with 1:58 remaining in the first quarter. Midway through the second, Brown picked up a Vic So'oto fumble at the UCLA 38 and returned it to the BYU 41 to set up Kai Forbath's 40-yard field goal that put UCLA ahead 20-0.

BYU had not lost since a 23-20 overtime defeat to Boston College nearly a year ago. The Cougars had won two straight against Pac-10 opponents coming in. They beat Oregon in last year's Las Vegas Bowl and Arizona to open the season last week.

``We fought back and rallied but, quite frankly, we didn't play well enough to win in all three phrases of the game to win in this setting against this strong of a team,'' Cougar coach Bronco Mendenhall said.