The Mountaineers (13-17, 6-11 Big 12) trimmed a 17-point deficit down to three in the opening minutes of the second half and were within four with 5 minutes left before Andrew Fitzgerald converted a three-point play off a driving layup before hitting a jumper on back-to-back possessions. Pledger followed with a 3-pointer that circled the rim before falling in to make it 76-64 with 3:16 remaining.
Sam Grooms tied his career best with 10 assists for the Sooners (20-9, 11-6), who moved another step closer to an NCAA tournament bid.
Colorado State graduate transfer John Gillon has chosen Syracuse, giving the Orange a potential starter at point guard entering the 2016-17 season.
DeSean Murray, who averaged 20.2 points as a sophomore at Presbyterian, will transfer to Auburn to play for coach Bruce Pearl.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.