Minnesota (8-7, 0-4) had a chance to win in the first overtime, but Mike Mitchell Jr. — a 91% free-throw shooter — missed twice with six seconds left and the Golden Gophers leading 73-71. John Mobley Jr. made two free throws with four seconds remaining to force a second extra period.
Royal stole the ball and dunked with five seconds left in regulation but missed on his chance for a three-point play, forcing overtime tied at 64.
Royal made just 5 of 14 shots from the floor, but he hit nine of his 11 free throws and added seven rebounds. Thornton made two 3-pointers and went 8 for 9 at the foul line. Glover had 13 points off the bench and Mobley scored 12. Micah Parrish added 11 points and seven rebounds.
Parker Fox had 21 points to lead the Golden Gophers. Lu'cye Patterson totaled 20 points, six rebounds and four assists. Mitchell and freshman reserve Isaac Asuma both scored 18 — a season-high for Asuma.
Fox scored 11 to help Minnesota take a 28-27 lead into halftime.
Minnesota made only 12 of 27 free throws, while Ohio State sank 29 of 33.
Ohio State will host No. 15 Oregon on Thursday. Minnesota travels to play Wisconsin on Friday.
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