At Husson University in Bangor, Max Andrews and Shawn Curran combined on a three-hitter as the third-seeded Crusaders advanced.
Andrews pitched three hitless innings with six strikeouts, before Curran worked the last four, allowing three hits and two runs.
John Bapst (13-4) scored three runs in the third and fourth innings to build the lead. Curran singled twice and knocked in two runs, while Andrew Catlin hit an RBI single.
Losing pitcher Dylan Hapworth tripled with an RBI to pace No. 6 Winslow (11-7). He gave up five hits and five earned runs with six strikeouts.
Joe Hopkins provided two singles.