Muonelo’s Injury Could Cause Cowboys to Struggle: Oklahoma State reserve Obi Muonelo will be out indefinitely after having surgery on a fractured fibula. He was a key producer off the bench for coach Sean Sutton, averaging 11.1 points and 4.1 rebounds per game. This loss could hurt the Cowboys, who lost their first game of the season at Tennessee last night. [12/19/06]