It was an up-and-down night for Jackson.
After making a 3-pointer with 11½ minutes to get Baylor within 56-46, Jackson had two turnovers in the next minute.
But Cameron Clark was called for a charge after stealing a bad inbound pass. A mishandled pass by Jackson right after that led to two free throws by Clark.
The Bears were within 21-20 after Jackson grabbed a rebound and drove the length of the court for a layup with about 8 minutes left in the first half.
That came after a one-minute span when Walton missed two free throws, Austin had a shot blocked by M'Baye, and Jackson missed the front end of a bonus situation.
Osby had a layup on an alley-oop pass from Hield to start a 15-2 run, and the Sooners led 36-22 after Hield penetrated inside and passed out to Andrew Fitzgerald for a jumper.
Baylor had only one field goal in a span of more than six minutes. That was Austin tipping his own miss — after the Sooners scored eight points in a row before that and the next seven afterward.