BERKELEY, Calif. (AP) _ Freshman Kyle Boller led two fourth-quarter scoring drives in his first college start as California rallied to beat Arizona State 24-23 Saturday in a Pac-10 opener.

A blocked extra-point try was the difference in the game.

Boller, the first true freshman to start at quarterback for Cal since current assistant coach Troy Taylor in 1986, completed 17 of 32 throws for 213 yards.

He threw touchdown passes of 16 yards to Marcus Fields and 12 yards to Michael Ainsworth, who had 11 catches for 121 yards.

The victory snapped Cal's four-game losing streak to the Sun Devils and marked just the second win in eight meetings since Bruce Snyder left Cal (2-1) following the 1991 season to coach at Arizona State (1-2).

Ryan Kealy threw Arizona State's first two touchdown passes of the season, both going to Richard Williams, but he was knocked out of the game early in the fourth quarter with bruised ribs. John Leonard replaced him but was ineffective.

With the score tied at 14, the Sun Devils started the fourth quarter with nine straight points, getting a 27-yard field goal from Stephen Baker and a 27-yard touchdown run from Delvon Flowers, set up by Craig Koontz's interception of Boller. However, Tully Banta-Cain broke through to block Baker's extra-point try, leaving Cal an opening.

Boller shrugged off his earlier interception to come back and lead a 75-yard drive ending in a 12-yard TD pass to Ainsworth with 10:05 remaining. Cal's defense then forced an Arizona State punt that Deltha O'Neal returned 21 yards to the Sun Devils' 27, leading to Steve Hershey's go-ahead 25-yard field goal with 7:11 left.

The Sun Devils' last best chance came when freshman running back Joe Igber fumbled with 1:28 remaining, but Leonard's third-down pass was intercepted by cornerback Atari Callen and Cal then ran out the clock.

The Bears turned two Arizona State mistakes into a pair of first-half touchdowns, countering scoring passes of 48 yards and 6 yards from Kealy to Williams.

Nick Murphy shanked a punt that traveled just five yards, with Cal taking over at the Sun Devils 14. Three plays plays later, Joshua White barreled in from 4 yards out to even the score at 7-all.

Kealy then finished an 80-yard drive with his second TD pass to Williams and soon had the Sun Devils on the move again. But Ryan Dennard fumbled after an 11-yard catch and Dewey Hale recovered for the Bears at the 46.

The turnover led to Boller's 16-yard touchdown pass to Fields, who took the short flat pass and ran down the sideline untouched as Cal caught the Sun Devils in an all-out blitz.