Trailing 7-6 with one out in the bottom of the seventh inning, the Indians tied the game on Minnich's fifth homer of the year - a solo shot over the center-field fence off Chambersburg reliever Brandon Caldwell.
"I had (a home run) in the back of my mind, but you can't think about that," said Minnich, who already had a pair of doubles in the game. "I just wanted to put the ball in play."
"Nate's home run just put the wind back in the sails," Chandler said. "From there, it was just meant to be."
Two batters later, Jamison Walck drew a two-out walk. Winning pitcher Cory Livengood (4-0) then hit a grounder to Trojans third baseman Brian Massimilla, whose throw sailed over the head of first baseman Ryan Lehman, putting runners on second and third.
Brenton Kopecek's grounder was then bobbled by second baseman Zach Frelin, whose throw to first was not in time to beat Kopecek as Walck scored the winning run.
"We just didn't do the job on defense," Chambersburg coach Bob Thomas said. "That's been our weakness. We just haven't fielded the ball well."
The Indians jumped out to a 3-0 lead in the bottom of the first against Trojans starter Sean Kline, getting RBI doubles from Minnich and Walck in the rally.
Chambersburg (13-4) only had four hits, but made each one count. Lehman homered in the second to make it 3-1. After Waynesboro upped its lead to 4-1, as Zach Helman doubled and scored on a single by Walck in the third, the Trojans cut it to 4-3 on their second hit of the game - a two-run blast by Derelle Owens in the fourth.
Chambersburg rallied for four runs in the sixth against relievers Joe Minnich and Livengood to take a 7-4 lead. After Minnich and Livengood each walked two batters to force in a run to tie the game, Marshall Gilbert drove in a run with an infield single and Alex Benedict drove in two with his single to left.
Waynesboro answered with two runs in the bottom of the sixth. Walck led off with a walk, went to third on a double by Livengood and scored on a sacrifice fly by Kopecek. Matt Anderson drove in Livengood with a single to left to make it 7-6.
"It was just an outstanding effort," Chandler said, "one through nine."