The Hoosiers have a day off before playing on Saturday. Ohio State (29-25) plays in an elimination game on Friday against Nebraska, which lost to the Buckeyes 15-2 in seven innings on Tuesday.
Andrew Wiggins had one of three run-scoring doubles in the second inning to help Indiana take a 5-0 lead. But Ohio State platted four in the bottom of the third despite being hitless.
Nick Mitchell raced to score from first on Brock Tibbitts' double in the sixth to extend the lead to 8-5. Indiana reliever Aydan Decker-Petty got Matthew Graveline to strike out with the bases loaded in the seventh to preserve the three-run lead.
Devin Taylor led off the eighth with a drive into the bullpen for the first of four Indiana runs, ending in a 12-5 advantage.
The teams combined for 401 pitches — with Ohio State registering 13 walks.
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