DALLAS (AP) _ Oklahoma won its first game without Big 12 rushing leader Adrian Peterson.
Now the Sooners face a Missouri team that will play its first game without one of the league's top defenders.
Tigers defensive end Brian Smith, the school's career sack leader, broke his right hip last weekend and is done for the regular season.
Coach Gary Pinkel still can't explain how the injury happened.
Smith got hurt in the second half of Missouri's 41-to-21 victory over Kansas State.
It was the same day the Sooners beat Colorado 24-to-3 in their first game since Peterson broke his collarbone falling into the end zone.
Number 19 Oklahoma on Saturday will visit Number 23 Missouri.