Osage lost a close contest to Bishop Garrigan 84-75.
The Green Devils were down 47-38 at half, but piled on a 19-point effort to bring within five, 57-62.
But the Golden Bears would handle the fourth quarter, riding their early-established lead and extending it with a 22-18 effort for the final 84-75 score.
Senior Drew Olson went 12 for 22 from the field, including one 3-pointer while adding seven free throws for 30 points. Senior Colin Klapperich put forth an 11-point effort and junior Brett Bobinet led the team with eight rebounds.
Osage took on Central Springs in the first-round of the post season. Results were not available at press time.