The game-winner answered a three-point play from Mark Lyons on the previous possession that tied the game for Arizona after the Wildcats had trailed for nearly the entire second half.
The Buckeyes took the lead early in the second half during part of a massive 22-5 run that begin shortly after Aaron Craft re-entered the game with two fouls. That run turned a 33-22 Ohio State deficit into a 44-38 lead.
Hot three-point shooting fueled Arizona's early lead -- the Wildcats were 5-8 from beyond the arc in the first half -- but Craft and Deshaun Thomas took over after that. Thomas had 20 points, 16 in the first half, while Craft responded to his foul trouble by dropping 13.
The Wildcats, meanwhile, went cold in the second half, making just one of ten threes. But 23 points from Lyons and 16 more from Solomon Hill kept the game close, allowing for Ross's late heroics.