LAS VEGAS -- Obinna Oleka had 27 points and 13 rebounds, and Arizona State dominated in overtime to beat Stanford 98-88 Wednesday in the opening game of the Pac-12 Tournament.
Arizona State (15-17) shot 56 percent and made 10 of 22 from 3-point range, yet couldn't shake the Cardinal (14-17) in regulation.
Stanford's Michael Humphrey hit a jumper with 3.3 seconds left to send the game into overtime tied at 81-all. Once overtime started, the Sun Devils pulled away to win in the Pac-12 Tournament for the third time in 16 seasons.
Arizona State moves on to play No. 5 Oregon in the quarterfinals on Thursday.
Reid Travis led Stanford with 23 points and Humphrey finished with 18.
Tra Holder had 21 points and Torian Graham 17 for the Sun Devils. Oleka's double-double was his 16th this season, most in school history since the Sun Devils joined the Pac-10 in 1978.
Arizona State won two regular-season meetings behind a barrage of 3-pointers. The Sun Devils made 25 in the two victories and Graham led the way, making 11 of 19 while averaging 27 points.
Arizona State again shot well against the Cardinal, hitting 15 of 25 shots and 15 of 17 free throws in the first half. The Sun Devils led by up 14, but Travis led Stanford back, scoring 15 points to pull the Cardinal within 50-42 at halftime.
The Sun Devils maintained their cushion for most of the second half before a short run by the Cardinal brought it to a one-point game with five minutes left, setting up the close finish.
Stanford: Loses its starting backcourt of Christian Sanders and Marcus Allen to graduation this offseason, along with backup center Grant Verhoeven.
Arizona State: Shot well and will need to do it again in the quarterfinals to have any chance against the deep, athletic Ducks.
Stanford's season is over.
Arizona State plays top-seeded Oregon in the Pac-12 Tournament quarterfinals on Thursday.