The Rebels (12-11 and 8-4 in league for second place) closed out their regular season with the victory, scoring six runs in the seventh off Chadwick reliever James Yates.
Termini, a freshman, hit a 1-1 pitch over the left-field fence for his first home run of the season, arriving at home plate with his teammates waiting to celebrate the walk-off slam.
“It can be hard because you are coming off the bench cold,” said Termini, who later retrieved the ball and planned to keep it as a souvenir. “I just thought that I needed to get something deep into the outfield.
“I didn’t think it would go that far. Then I saw the left fielder go back toward the fence and I thought maybe it had a chance. We just wanted to get the win and some momentum going into the playoffs.”
Veteran Flintridge Prep Coach Buzz Cook called on Termini to bat for Alex Sierra. Cook recalled Termini coming through during his first pinch-hit appearance earlier in the season in a league contest against Rio Hondo Prep.
“He had a pinch-hit double and it just missed being a home run,” said Cook, whose team will find out where it will play its first postseason contest when the CIF unveils the brackets Monday. “So, now he’s got seven RBIs in two pinch-hitting appearances.
“I figured in this situation [Thursday] that we needed a deep fly ball to win the game.”
Flintridge Prep closed to within 7-6 on a run-scoring single by Ben Slyngstad before Will Peterman tied the game when he grounded a 3-2 pitch from Yates to right.
Peterman (3-2) pitched a scoreless seventh in relief to earn the victory and help the Rebels sweep the three-game series against the Dolphins.
Chadwick (7-13 and 5-7 in league for third place) appeared to have things under control. The Dolphins scored three runs in the first.
Yates and Charlie Madden came through with back-to-back triples to stake Chadwick to a 2-0 lead before extending the lead to 3-0 on a run-scoring single by Raymond Gomez.
Chadwick scored twice against Park in the second on run-scoring singles by Yates and Mike Kogan.
Gomez, who started on the mound, limited Flintridge Prep to one hit through four innings before encountering trouble in the fifth. Gomez uncorked a wild pitch to make it 5-1 before Conor Dubin and Kyle McDonald had back-to-back run-scoring hits to pull to within 5-3.
After Chadwick took a 7-3 lead in the top of the sixth, Flintridge Prep rallied for a pair of runs on a single by Sierra and a double by Dubin that brought home Sierra.
“It’s a big win for us and I hope that we can use it as a springboard,” said Cook, whose team qualified for the CIF Southern Section Division V playoffs last season.