Jared Butler had 25 points and made a key layup to force overtime, where Davion Mitchell hit the go-ahead basket with just less than a minute to play, as visiting No. 3 Baylor clinched its first conference championship in 71 years with a 94-89 Big 12-win over No. 6 West Virginia on Tuesday in Morgantown, W.Va.Trailing 81-79, Butler muscled the ball in on a drive to tie the game with 2.7 seconds left and ultimately force overtime. In the extra session, after Butler fouled out and with West Virginia up 90-89,Mitchell (20 points) scored to put Baylor (19-1, 11-1 in Big 12) ahead for good.Matthew Mayer added 18 points for the Bears, who shot 51.4 percent to rebound from their first loss of the season Saturday at Kansas, and earn the program’s first league title since winning the Southwest Conference in 1950.Taz Sherman had 26 points, Miles McBride scored 19 and Sean McNeil added 18 for West Virginia (17-7, 10-5 in Big 12), which shot 46.4 percent but allowed Baylor to score the final six points of overtime.West Virginia trailed 40-35, but surged ahead via a 15-3 run. It was highlighted by 11 straight Mountaineers’ points from McNeil. He tied the game at 40-40 with a 3-pointer, but Butler’s 3 put the Bears ahead. McNeil made a long 2, then hit back-to-back 3-pointers, the first to give West Virginia its first lead of the game at 45-43 with 15:23 left in regulation.