Smithtown Christian junior righthander Jimmy Seviour cruised through six innings of no-hit ball with a two-run lead. Then it started to come apart, but Seviour never wavered.

Two-time defending state Class D champion Smithtown Christian watched as Chapel Field (Hudson Valley) made a stunning last-inning comeback Saturday in the Southeast Regional final at the Police Athletic League Complex in Holtsville.

Seviour hit Andy Spanjer with a pitch and saw his no-hit bid end when Logan DeVries lined a single to rightfield. Jake Spanjer’s RBI single made it a one-run game.

Then Seviour clinched his team’s 2-1 victory by reaching back for a little more on his fastball. With runners at second and third, he struck out the next three batters.

The Crusaders (12-9) will play West Canada Valley in a state semifinal at Broome Community College at 10 a.m. Saturday.

“I knew I had a no-hitter into the seventh inning and I missed my spot on that first hit,” Seviour said. “I left the pitch up. After that, I had to settle down and focus on getting the win.”

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Seviour allowed two hits, walked three, hit a batter and struck out 13.

“He was lights out, the best pitcher we’ve seen all season,” Chapel Field coach Joe Canazon said. “We were overmatched for most of the game. But I am extremely proud of our guys and the way we battled there in the last inning.”

Chapel Field (11-6) had a scoring opportunity in the first inning when Seviour walked consecutive hitters. With one out, Seviour walked Ethan Jacobsen but picked him off two pitches later. He then walked Andy Spanjer, but DeVries grounded to first to end the inning.

“He found his rhythm after the first inning,” Smithtown Christian coach Chris White said. “He was focused.”

Andy Spanjer allowed a run in each of the first and third innings. He allowed five hits, walked none and struck out six in the complete-game effort.

Smithtown Christian opened the scoring in the first when leadoff man Glenn Middendorf tripled and scored on a one-out sacrifice fly by Austin Sala. “That was an important run to get some momentum and get ahead,” Sala said. “Especially with Jimmy on the mound.”

In the third, the Crusaders bunched three straight two-out hits to make it 2-0. Middendorf singled, moved to third on a single by Sal Ciavarino and scored on Sala’s single.

“We had to make some adjustments to their pitcher,” Sala said. “He was trying to keep us off balance.”

Middendorf, who started both rallies for the Crusaders with opposite-field hits, said his job is just to get on base.

“I have a leadoff mentality no matter how many men are out,” he said. “It’s what I do.”