With the bases loaded and two outs in the seventh inning of Sunday’s game between No. 6 Paul VI and top-ranked DeMatha, Panthers junior Yianni Tsiamis was called upon to record the final out.

Tsiamis inherited a two-ball count before quickly evening it with a pair of fastballs. DeMatha hitter Ben Prada ran the count full on the next pitch, but Tsiamis then induced a flyball to center field to give Paul VI a 6-3 victory at Riverdale Park. The Panthers handed the Stags their first loss of the season.

“I just feel like he’s a strike-thrower and in a big moment he can get the job done,” Paul VI Coach Jeff Nolan said of inserting the transfer from Gonzaga. “Our pitching today did a heck of a job. They’re a very good offensive team, and our pitchers rose to the occasion and executed.”

Paul VI sophomore Kevin Kelly entered in relief in the bottom of the sixth with runners on first and second and no outs and picked up back-to-back swinging strikeouts, then a groundout. He pitched 12 / 3 innings and allowed just one hit.

Kelly also went 1 for 2 at the plate and reached base on a fielder’s choice and a Stags error, one of four committed by DeMatha.

“It’s a big win. They’re a nationally ranked team, and we’re excited we got the win,” Tsiamis said after the Panthers improved to 8-4 and 4-3 in the Washington Catholic Athletic Conference. “It’s good stuff to build on moving forward.”

The Stags (7-1, 5-1) struck first as All-Met catcher Justin Morris (3 for 3, two doubles and a walk) smacked an RBI double in the first inning. The Panthers answered in the fourth by scoring two runs with the help of three DeMatha errors.

Jack Morgan knocked in a run for the Panthers with a double in the fifth to give them a two-run lead. In the bottom of inning, Antonio Rosanova belted a grounder down the third base line to knot the game at 3.

Paul VI regained the lead when Michael Coritz (1 for 4) hit an RBI single past the pitcher. John Cunningham then plated a run on a groundout, and Morgan (2 for 3, RBI) was able to score on the Stags’ final error of the night.

“I had to forget those last three at-bats and come up clutch in that situation. I’m glad I did that job,” Coritz said. “The whole game I was popping the ball up, but I stayed on top of it in the sixth and drove it [up] the middle.”