Seth Towns is a natural when it comes to staying poised. So when Ohio State coach Chris Holtmann needed an extra body to fill a key role Friday, he gave the Harvard transfer an opportunity.

Towns took full advantage of it, scoring a season-high 12 points in 11 minutes and making the tiebreaking free throw to start overtime as the ninth-ranked Buckeyes beat No. 21 Purdue 87-78 in the Big Ten Tournament quarterfinals. Towns scored six points in OT, including a crucial 3-pointer with 2:53 left.

The Buckeyes (20-8) may need their graduate transfer to come up big in Saturday’s semifinal matchup against No. 4 Michigan, their longtime rival and the Big Ten regular-season champs, especially if Kyle Young is out. Young matched his career with 18 points in the first half but most of the second half after taking an inadvertent elbow to the head.

Young tried to play but eventually came out and did not return. Ohio State also finished the game without all-conference forward E.J. Liddell, who fouled out after scoring 17 points, grabbing five rebounds and dishing out five assists. Duane Washington Jr. led Ohio State with 20 points.

Trevion Williams finished with 26 points, 14 rebounds and five assists as Purdue’s five-game winning streak ended. Jaden Ivey added 19 points.