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Matt Strasen, Associated Press
Oklahoma St guard Brian Williams (4) goes to the basket between SMU forward Leslee Smith, left, and forward Shawn Williams (2) in the first half of an NCAA basketball game in Dallas, Wednesday, Dec. 28, 2011.

DALLAS — Cezar Guerrero scored seven of his 14 points at the start of the second overtime and Oklahoma State defeated SMU 68-58 Wednesday night.

The Cowboys (7-5) closed the game with a 16-0 run, with the final six points in the first overtime before outscoring SMU 10-0 in the second extra period.

SMU (7-5) had matched its biggest lead of the game when Robert Nyakundi made three free throws for a 58-52 advantage with 1:17 left in the first overtime. Keiton Page then made two 3-pointers in a span of 33 seconds, with a miss by Nyakundi between those shots.

Guerrero opened the second overtime with a 16-foot jumper, then made a 3-pointer and had a driving layup to stretch the lead to 65-58.

Page led Oklahoma State with 27 points.

Nyakundi had 20 points and 11 rebounds for SMU, which has lost 10 in a row against the Cowboys.