STILLWATER (AP) — Cameron McGriff stepped up to be the exactly player Oklahoma State coach Mike Boynton has been looking for. McGriff, a senior forward, matched a career high with 28 points and helped Oklahoma State defeat rival Oklahoma 83-66. McGriff also was the primary defender on Brady Manek, the Sooners’ No. 2 scorer for the season. Manek, who scored 30 points in Oklahoma’s win over the…