Kellen Dunham scored 32 points and Khyle Marshall added 30 as Butler beat Washington State 76-69 Thursday in the first round of the Old Spice Classic.
Dunham set a tournament record for points in a game.
Butler (5-0) will face No. 5 Oklahoma State in Friday's semifinals. The Cowboys, behind 30 points from Marcus Smart that had tied the tourney record at the time, downed Purdue 97-87 earlier Thursday.
DaVonte Lacy had 26 points for Washington State (2-3), which has lost three in a row.
A tight affair saw the teams stay within three points of each other most of the second half.
Dunham hit a 3 and Kameron Woods followed with a dunk after a steal to put Butler ahead 70-67 with just under 2 minutes to play. After Washington State missed a pair of free throws, Dunham nailed another long-distance jumper and made two free throws to make it 75-67 with 21.7 seconds remaining.
Marshall had 14 points to help Butler take a 30-26 halftime lead.