Norman, OK (SportsNetwork.com) - Buddy Hield's bucket, the last of his team- high 18 points, came with two-tenths of a second left in regulation and lifted No. 15 Oklahoma to a 75-73 decision over No. 9 Kansas in the regular-season finale for both programs.

Isaiah Cousins posted 16 points and four assists for the Sooners (21-9, 12-6 Big 12), while TaShawn Thomas added 13 points. Oklahoma has clinched at least a tie for second in the conference.

With leading scorer Perry Ellis out, Frank Mason poured in a game-best 21 points for the Jayhawks (24-7, 13-5). Landen Lucas totaled 13 points and 12 rebounds, with Jamari Traylor and Kelly Oubre totaling 12 apiece.

As the No. 1 seed in the upcoming tournament, Kansas will rest until a Thursday quarterfinal.

"I thought our kids competed well, I thought OU played hard," said Kansas coach Bill Self. "I thought it was a good college game."

Mason connected on two free throws with 9.4 seconds to play, and Kansas closed to within 71-70, but Jordan Woodard drew contact at the other end almost immediately and he made his two tries from the line with 7.4 showing.

Oklahoma made a tactical error in fouling Mason again, but this time behind the three-point line, and Mason dropped in all three for a 73-73 deadlock.

That set up the final play, which began as Woodard drove for a layup as the final seconds ticked down. He missed the shot, but Hield was there for the put-back as the buzzer sounded.

"I just saw that Jordan had a good attack to the rim," said Hield. "I just saw the ball hit the rim and I was able to tap it back in."

Thanks to a pair of Frank Booker treys and Hield bucket, the Sooners took a 27-16 edge in the late stages of the first half.

Kansas eventually whittled its deficit to 32-30 at halftime despite shooting only 27 percent (10-of-37) from the field.

Cousins completed a three-point play and the Sooners were ahead 47-40 early in the second half. Lucas' jumper capped a brief surge by the Jayhawks, who took a 55-54 edge with eight minutes to go.

Hield's pull-up shot gave Oklahoma the lead back at 63-61 a short time later.

Game Notes

Hield also contributed seven rebounds to Oklahoma's win ... The Sooners scored 18 points off 11 Jayhawks turnovers ... Kansas' Brannen Greene was suspended due to a conduct violation, while Cliff Alexander was on the sidelines for a third consecutive game due to an NCAA investigation.