Ohio State guard Aaron Craft (4) drives against Iowa State forward Anthony Booker (22) in the first half of a third-round game of the NCAA college basketball tournament Sunday March 24, 2013, in Dayton, Ohio. Ohio State forward Sam Thompson reacts in the first half of a third-round game of the NCAA college basketball tournament against Iowa State Sunday March 24, 2013, in Dayton, Ohio. Iowa State head coach Fred Hoiberg calls a play against Ohio State in the first half of a third-round game of the NCAA college basketball tournament Sunday March 24, 2013, in Dayton, Ohio. DAYTON, Ohio (AP) - Aaron Craft hit a 3-pointer with a half-second left, and Ohio State escaped Dayton - a place of heartaches - as the lone high seed left in the NCAA tournament's wild West Regional, beating Iowa State 78-75 on Sunday. 2 Ohio State (28-7) needed Craft's only 3-pointer of the game - an arching shot over 6-foot-7 defender Georges Niang from the top of the key - to avoid yet another upset in the West. Four of the top five seeds have fallen fast and hard in that most-busted bracket. The Buckeyes' 10th straight win sends them into the round of 16 for the fourth straight year, a school record. They'll play sixth-seeded Arizona on Thursday in Los Angeles. Tenth-seeded Iowa State (23-12) overcame a late 13-point deficit by hitting 3s - the Cyclones' specialty - but wound up beaten by Craft's lone basket from behind the arc.