It was part of a perfect 4-for-4 weekend for the first-place Islanders (9-1) in New Brunswick Junior Baseball League action.
The Islanders trailed 8-3 in the opener of the doubleheader, but refused to pack it in.
Curtis McGregor had three hits while MacIsaac and Riley Gallant each had two and Dominique Ryan reached base four times and scored three runs.
Logan Gallant pitched five innings of shutout ball to pick up the win.
Aaron Ingersoll was the losing pitcher. Ryan Evans and Ayron Fournier each had two hits.
Game 2
In Game 2, P.E.I. again fell behind early, this time 4-1 after three innings. The Islanders bats exploded for 13 runs in three innings in the 14-4 win in a game called after six innings due to mercy rule.
Midget affiliate Logan MacDougall gave the short-handed Islanders pitching staff a huge lift with a complete game effort for the win.
Riley Gallant, Brett Hicken, Jed Noonan and McGregor all had two hits.
Matt Nason took the loss while Dawson Griffin and Brett Armstrong each had two hits for Saint John.
Saturday
Riley Gallant’s walk-off single in the bottom of the ninth gave the Islanders a sweep of the Chatham Ironmen Saturday in Charlottetown.
Gallant's hit plated pinch runner Conor McGregor to give the Islanders the 3-2 win in Game 2. McGregor was running for his brother Curtis, who started the rally with a leadoff single.
Hicken picked up his third win of the season pitching five shutout innings in relief of starter Jayden MacLean, who went four solid inning.
Riley Gallant was 3-for-4 for P.E.I. while MacIsaac, Darcy Affleck and Curtis McGregor all had two hits.
Zach Gosse went the distance for the Ironmen, giving up 10 hits. Tyson Sargent had two hits for Chatham.
In Game 1, Porter Smith recorded his second complete game victory of the season, surrendering three hits and two walks while striking out five, in a 6-0 win.
P.E.I. scored four in the first inning and never looked back. Ryan had two hits and scored three times for the Islanders while Logan Gallant had two hits to spark the offence.
Liam Young went four innings in a losing cause for Chatham. Jeremy Poole had two hits the Ironmen.
The Islanders host Fredericton for a doubleheader on Saturday beginning at noon.
