A pair of mid-range jumpers put the Cowboys up 23 in the opening minute of the second half and a spectacular dunk by Brown off an alley-oop pass from Smart gave the hosts a 25-point margin four minutes later. Forte's 3 from the corner put the hosts up 68-32 with 6:51 to play.
Dillard, the only Golden Eagles' player averaging double figures entering Saturday, hit a shot-clock-beating 3-pointer to draw the visitors within 34-19 with 52 seconds left in the half. But a 3 by Smart and a free throw by Murphy following an intentional foul gave Oklahoma State a 19-point halftime advantage.
Dillard had 13 points in the first half. Seven of OSU's 13 first half field goals came from 3-point range, three by Smart.
Oklahoma State has won 180 of 184 games against nonconference opponents at Gallagher-Iba Arena since 1987.