T.J. McConnell shined on offense and defense while Gabe York made five three-pointers to finish with 19 points, leading second-seeded
The Wildcats (33-3) overcame a sluggish start until their outside shooting busted the Buckeyes' zone defense, which they rarely relied on during the regular season.
McConnell, who finished with 19 points, six rebounds, six assists and five steals, was the primary defender on Ohio State guard D'Angelo Russell, who scored 28 points in the Buckeyes' overtime defeat of VCU but was held to nine points on three-of-19 shooting Saturday.
The Pac-12 champions went ahead by 15 points with 6:34 left in the second half and cruised to the win over Ohio State (24-11).
Arizona will face the winner of Xavier-Georgia State in the West Regional semifinals Thursday in Los Angeles.
Russell had seven rebounds and six assists in what was probably his final collegiate game. He wore a bandage to cover the five stitches he received above his left eye after taking an elbow in Thursday's game and spent the final minutes on the bench listening to Arizona's fans chant "U-of-A!" as their team ran away.
Sam Thompson added 18 points and Shannon Scott scored 10 for the Buckeyes, who led by six points in the first half but never could match Arizona's size. The Wildcats won the rebounding battle, 43-26.
It was sweet redemption for the Wildcats and Coach Sean Miller, who lost on a last-second shot to Ohio State in the regional semifinals two years ago. And it was the first time in three tries Miller beat close friend and Ohio State Coach Thad Matta, who also handed Miller's Xavier team a last-second defeat in the 2007 tournament.
The Wildcats remain on track for another revenge game: a rematch against
And if they can continue to turn in these types of performances, the Wildcats like their chances.
Miller had pleaded with his team to improve its defense after beating Texas Southern, 93-72, in its opening game. Arizona answered its coach's call, though the offense took longer to come around this time.
The Wildcats looked slow and stagnant most of the first half against Ohio State's smothering zone. In the second half, they worked the ball at a blistering pace and started hitting shots from outside.