Payton Pritchard stole an inbounds pass with 2.1 seconds to play, and Will Richardson scored 21 points off the bench to lead No. 9 Oregon to a 74-73 overtime win over No. 24 Arizona in their Pac-12 matchup Thursday night in Eugene, Ore.

The Wildcats had two chances to win in the final four seconds, but Nico Mannion, a freshman who led the Wildcats with 20 points and six turnovers, missed a jumper and threw a bad pass.

Pritchard had 18 points, seven rebounds, six assists and three steals, and Richardson scored seven of Oregon's eight overtime points. The Ducks (13-3 overall, 2-1 in Pac-12) have won four straight against the Wildcats.

Josh Green had 17 points and Zeke Nnaji 11 with 14 rebounds for Arizona (11-4, 1-1).

Chris Duarte has 17 points and eight rebounds for the Ducks, who never led by more than three points throughout the game.

In overtime, Oregon went ahead 71-68 on a spinning layup and free throw from Richardson. Then Mannion drilled a 3-pointer to tie the score at 71 with 1:37 left.

With Oregon down 66-64, Pritchard hit a difficult fadeaway jumper, then got a piece of Nnaji's shot with four seconds to force overtime.

Oregon took its first lead of the game 47 seconds into the second half on a Francis Okoro dunk. But the Wildcats went ahead 57-52 on a 3-pointer from Dylan Smith with 7:20 to play.

The Ducks responded with an 8-0 run, with treys from Pritchard and Duarte to take their largest lead at 60-57. The Wildcats came back with seven straight points, two free throws and a basket from Nnaji and a 3-pointer from Smith from well beyond the top of the arc.

The Ducks trailed the entire first half but were down only 36-34 at the break. Mannion scored six of Arizona's first seven points as the Wildcats broke out to a 7-0 lead, and it took Oregon almost 4 1/2 minutes to get its first basket.

Back-to-back dunks from junior forward Ira Lee gave the Wildcats a 20-11 lead with 9:58 to go. Arizona's biggest lead was by 11, 29-18, after a three-point play from Josh Green.

Oregon couldn't keep Nnaji off the glass, as the 6-11 freshman grabbed 10 rebounds in the first half, with four on offense.