WEST LAFAYETTE, Ind. — Oral Roberts welcomed the madness back to March.

The 15th-seeded Golden Eagles pulled off the first major upset of the first NCAA Tournament in two years, holding off second-seeded Big Ten power Ohio State 75-72 in overtime on Friday.

Oral Roberts got poised, impeccable performances from its two star players, guard Max Abmas and forward Kevin Obanor, to become the ninth 15 seed to win a first-round game and the first since Middle Tennessee shocked Michigan State in 2016. Last year’s tournament was called off because of the pandemic.

Obanor scored seven of Oral Roberts’ 11 points in overtime, including two free throws with 13 seconds left, and finished with 30 points and 11 rebounds. Abmas, the nation’s leading scorer, had 29 points.

Ohio State could have tied it in the closing seconds of overtime, but Duane Washington Jr.’s open 3-pointer from straight away bounced off the side of the rim, and Oral Roberts celebrated its first tournament win since 1974.

The Golden Eagles (17-10) advanced to play seventh-seeded Florida in the South Region on Sunday.

North Texas 78, Purdue 69

INDIANAPOLIS — To be, or not to be? For an underdog named Javion Hamlet and his group of scrapping North Texas teammates, that was an easy question.

Hamlet scored 24 points and Thomas Bell had 16, along with some game-changing defense in overtime, to lift the 13th-seeded Mean Green to a 78-69 win over No. 4 Purdue on Friday in the NCAA Tournament.

It marked the second teen-powered upset of the Big Ten on the opening day of the NCAA Tournament — this one coming hours after No. 15 Oral Roberts knocked out Ohio State.

What a great prize for Hamlet and Bell, a pair of seniors who led the Mean Green (18-9) to a regular-season Conference USA title last year but missed a chance at the tournament when the season was canceled by COVID-19.

They made sure things kept going this time.

Bell opened overtime with a 3, then altered two Purdue shots underneath to help the Mean Green turn the extra session into a laugh. North Texas scored the first 11 points.

Butler graduate Ethan Morton, a freshman guard at Purdue, did not play for the Boilermakers (17-10).

Wisconsin 85, UNC 62

WEST LAFAYETTE, Ind. — North Carolina coach Roy Williams lost his first opening-round NCAA Tournament game in 30 tries as ninth-seeded Wisconsin blew out his eighth-seeded Tar Heels 85-62 on Friday night.

Brad Davison scored 29 points for the Badgers, who negated North Carolina’s size advantage by draining 13 of 27 3-pointers. The Badgers (18-12) had lost four of five entering the tournament.

Davison made 5 of 7 3-pointers and 10 of 15 shots overall. D’Mitrik Trice scored 21 points for Wisconsin, which advanced to play the South Region’s top seed, Baylor, on Sunday.

NCAA Scores

By The Associated Press

First Round

Arkansas 85, Colgate 68

Baylor 79, Hartford 55

Florida 75, Virginia Tech 70, OT

Houston 87, Cleveland St. 56

Illinois 78, Drexel 49

Loyola Chicago 71, Georgia Tech 60

Wisconsin 85, North Carolina 62

Oral Roberts 75, Ohio St. 72, OT

Oklahoma St. 69, Liberty 60

North Texas 78, Purdue 69, OT

Oregon St. 70, Tennessee 56

Texas Tech 65, Utah St. 53