Roeland Schaftenaar sparked a 7-0 overtime run and Oregon State came from behind for a 65-62 win against Stanford in Wednesday's semifinals of the College Basketball Invitational.
Lathan Wallace had 16 points and three steals for Oregon State (16-17), which lost a six-point lead in the final 2:30 of regulation, but overcame a five-point deficit in overtime.
Schaftenaar added 14 points and Calvin Haynes 10 for the Beavers, who will host Texas-El Paso on Monday in the first game of the best-of-three CBI championship series.
Anthony Goods led Stanford (20-14) with 20 points.
It was the fourth meeting of the year between the Pac-10 conference rivals. The Beavers swept the regular-season games, but the Cardinal got even in the first round of the postseason tournament.
On Wednesday, Oregon State had a 28-26 halftime lead after Haynes had a steal and basket with one second left. The Beavers held the lead despite suffering through an eight-minute stretch without a point. The Beavers survived by holding the Cardinal to just five points.
Drew Shiller's 3-pointer capped a 9-0 run that put Stanford ahead 35-30 with 14:15 remaining in regulation. Oregon State regained the lead, with Seth Tarver's score giving the Beavers a 51-45 lead with 2:36 left.
But Stanford came back, and Lawrence Hill's 15-foot shot at the buzzer sent the game into overtime tied at 54.
Landry Fields' 3-pointer gave the Cardinal a 61-56 lead with 2:30 left in overtime, the Cardinal was held to one point after that.
Schaftenaar scored the first five points of that late 7-0 run, then found Tarver at the basket for two more.
Hill finished with 14 points for Stanford and Fields had 11.
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