The five-time defending Division I state champion Upper Arlington High School boys lacrosse team needed a game-tying score with 12.2 seconds remaining in regulation and an unusual situation in overtime to beat Dublin Coffman 10-9 in a regional semifinal Wednesday.

After the Shamrocks took a 9-8 lead with 3:33 left on a goal by Evan Bowdy, the Golden Bears held possession for much of the remainder of regulation before finally sending it to overtime with an unassisted goal by Spencer Parsons.

A little more than one minute into the four-minute sudden-death overtime, the stick of the Bears' Colin Casey broke, causing a loose ball. Luke Treece beat Coffman's defenders to the ball and threw one past Sam Gans for the game-winner with 2:34 remaining.

UA, which needed overtime to edge the Shamrocks 8-7 on April 15 as well, improved to 14- 2 and will play Thomas Worthington in a regional final Saturday.

"It seems like we come out slow every time we play them," Treece said. "I think people were a little confused because the top of the stick of one of our players came off.

"It's going to be a tough game (against Thomas). We've got to come out firing and ready to go."

Coffman led 6-4 at halftime and took a 7-5 lead on a goal by Ryan Borcherding with 2:25 to go in the third, but UA's Kyler Cooper scored off a pass from Alex Drake with 1:50 left in the period and Treece scored off a pass from Kyle Frost 24 seconds later to tie it.

The Bears made it 8-7 on a goal by Kyle Cassady with 9:58 remaining. The Shamrocks tied it on an unassisted goal by Borcherding with 4:56 to go.

Treece finished with three goals and Parsons added two for the Bears.

Bowdy and Borcherding both scored three goals and Gans made 10 saves for Coffman, which finished 10-9.

It was the final game for Shamrocks coach Marc Carlson, who has resigned after four seasons.

"Everybody, from top to bottom, left everything on the field," Carlson said. "I think our kids outplayed them for three of the four quarters but it was the same result as the first time we played them."