"It's like a dream," said Paolini, who hit the first home run of his high school career, a solo shot down the left-field line that gave Burlington County a 4-1 lead in the fourth inning.
Paolini rounded third and slapped hands with third-base coach Steve Paolini, his father and coach at Holy Cross.
"That makes it twice as good," said the younger Paolini, who is entering his junior year at Holy Cross.
Burlington County needs two more victories to capture its third title since 2009.
"It's the coaching," Zimmer said. "The players change but the coaches are the same, so it's got to be the coaching."
Burlington County had a hit in every inning, and Stringham, Cinnaminson senior Christian DeLuca, Northern Burlington senior Zach Gakeler, and Maple Shade senior Matt Lutz had two each.
"You would have a tough time throwing it by anybody in our lineup," Zimmer said.
Eastern senior Tom Flacco, Eastern junior Ryan Keen, Haddonfield junior Jake Thorndike, and Collingswood junior Lucas Rollins delivered RBI hits for Olympic Colonial, which was trying to advance to the tournament semifinals for the first time since the Phillies opened Citizens Bank Park in 2004.
The tournament's all-time leader with five titles (all from 1989-1997), Olympic Colonial rallied to take a 5-4 lead with three runs in the bottom of the sixth, sparked by Thorndike's RBI double to deep center.
But Burlington County answered with two runs in the top of the seventh as Stringham led off with a double. Two walks, two wild pitches, and an infield error turned the momentum in the visiting team's favor.
Burlington County added an insurance run in the eighth as Lutz, Stringham, and Maple Shade junior Brennan Taylor strung together two-out singles.
Zimmer was the losing pitcher in an epic game in the South Jersey Group 3 final on May 30. He went nine innings, struck out 21, and threw 178 pitches but took a 2-0 loss when Mainland, the eventual state champion, scored a pair of runs on wild pitches.
"That was really tough," Zimmer said. "I hate to lose, and I felt like I let my team down with a couple of bad pitches."
Zimmer didn't pitch again until Monday. He said he didn't even have a catch until more than a week after the game, and only recently threw a couple of short bullpen sessions.
"I can't come out of a game," Zimmer said of his high pitch count in the last game of his Moorestown career. "Coach [Bill Donoghue] was talking to me the whole game. It was my fault. I should have been more aware of my pitch count."
Zimmer allowed two hits and a run and walked three Monday. But the Delaware recruit showed a live fastball with five strikeouts and he worked out of trouble despite a shaky defense that committed three of its five errors during his time on the mound.
"It was great to get back out on the mound and play with these elite guys," Zimmer said. "This was a great opportunity for me."
Burlington County 120 100 210 - 7 13 5
Olympic Colonial 101 003 000 - 5 8 3
WP: Scott Zimmer. LP: Nick DeRitus.
2B: BC-Christian DeLuca, Nick Corbi, Collin Stringham. OC-Jake Thorndike.
HR: BC-Joe Paolini.