Kansas State 73, No. 21 Oklahoma State 67: Rodney McGruder scored 26 of his season-high 28 points in the second half to lead the Wildcats to their fifth straight win in the Big 12 opener for both teams.

Trailing 32-30 at halftime, Kansas State (12-2, 1-0 Big 12) rode McGruder, who scored 15 of the Wildcats' first 17 points in the second half. McGruder made 10-of-13 shots from the field after the intermission, including five 3-pointers.

Oklahoma State (10-3, 0-1) dropped its second straight and could not recover from McGruder's monster second half. The Cowboys shot just 40.8 percent and made just 3-of-11 from 3-point range. Freshman Marcus Smart led Oklahoma State with a career-high 25 points and Markel Brown added 19.

Kansas State also got a boost from Nino Williams, who came off the bench to score a career-high 17 points. Angel Rodriguez, the Wildcats' second-leading scorer (10.1) was held to three points but tied a career high with eight assists.

NOTEBOOK: Kansas State has now beaten two ranked teams this season. The Wildcats began their current five-game win streak with a win over Florida. ... Oklahoma State leading scorer Le'Bryan Nash was held to six points on 2-for-7 shooting and was in foul trouble most of the game. ... Kansas State visits West Virginia on Jan. 12, while Oklahoma State hosts TCU on Jan. 9.