M'Baye came up with seven straight points for the Sooners (11-3, 2-0 Big 12) late in the second half to put the game away after their 14-point lead had been nearly eliminated.
Oklahoma went 8 for 13 from 3-point range and defended its home court in the Bedlam rivalry for the ninth straight season. The Cowboys (11-3, 1-2) haven't won in Norman since 2004, when they went on to win the Big 12 championship and reach the Final Four.
NCAA title game hero Kris Jenkins said he will withdraw his name from the NBA draft and return to Villanova for his senior season.
Andy Katz breaks down the likelihood of Villanova, Syracuse, North Carolina or Oklahoma making a run to the Final Four next season.
Florida State has announced that Xavier Rathan-Mayes will return to the court for his junior season. The 6-foot-4 guard declared for the NBA draft last month but did not hire an agent.