WACO, Texas (AP) _ Jeff Mandel gave up one run before leaving in the top of the ninth and Raynor Campbell hit a three-run homer to help lead Baylor to a 4-to-2 win over Oklahoma.
Mandel (4-5) struck out five and walked two for the win Thursday night in Waco.
Baylor (18-14, 3-7 Big 12) was leading 1-0 when Campbell knocked the three-run homer.
Aaron Baker went 1-for-4 for Oklahoma (22-10, 3-4). His two-run single in top of the ninth scored Aljay Davis and Joseph Hughes.
Baylor reliever Nick Cassavechia left two Sooners on base.
Stephen Porlier (4-3) got the loss after 6 1/3 innings of work. He gave up two runs and two hits, while walking two and striking out eleven.