But McCall, who scored Stanford's first eight points of the first overtime, converted a reverse layup with 1 seconds remaining, tying the score at 63-all and forcing a second OT.

McCall was scoreless on 0-for-7 shooting at halftime, but finished with 25 points and 12 rebounds. "I was frustrated," admitted McCall, Stanford's leading scorer. "Once my shot started falling, I felt more comfortable and confident."

Stanford's Brittany McPhee made a driving layup and was fouled with 9.2 seconds left in the fourth quarter, but missed the ensuing free throw that might have won the game. Oregon State then turned the ball before getting a shot off, forcing overtime.

Mikayla Pivec added 13 points for OSU and teammate Breanna Brown had 13 points, 10 rebounds and four blocked shots before fouling out.

The duel of the Pac-12's two stingiest defensive teams led to OSU shooting 38.2 per cent with 22 turnovers. Stanford converted a season-low 32.9 per cent.

BIG PICTURE

The Beavers are 75 per cent through an unprecedented stretch of four straight games against Top-25 opponents. They beat then-No. 9 Washington 73-70 and No. 20 Cal 66-56 before beating No. 10 Stanford. They play Friday at No. 9 UCLA, marking the first time the Beavers have tackled three straight ranked foes on the road.

Stanford's long-time home dominance took a hit. The Cardinal lost just their fifth conference home game in 83 tries since 2007-08, and ninth home game overall in 152 outings over the past 10 years.

POLL IMPLICATIONS

The Cardinal will drop out of the top-10 and Oregon State, having completed a road sweep of Cal and Stanford, figures to become the Pac-12's highest-ranked team when the next poll is released.

MISSED OPPORTUNITY: VanDerveer said her team played with confidence in the overtimes, but conceded the Cardinal had a great chance to win in regulation before McPhee missed the go-ahead free throw. "We're at the line and we can win it," she said. "Our free throws (17-for-26), that to me, is the big difference."

UP NEXT

Oregon State remains on the road for another week, beginning Friday against Pac-12 pre-season favourite No. 7 UCLA. The Bruins (11-4, 2-2) stumbled on the road this week, losing at Washington State and Washington. The Beavers won two of three from UCLA last season, splitting two regular-season matches before winning 69-57 to win their first Pac-12 tournament championship.

Stanford plays Friday at Utah (12-3, 1-3). The Cardinal is 20-0 all-time vs the Utes, winning by margins of 20 and 18 points last season.

By Jeff Faraudo, The Associated Press