— Kaleigh Fratkin scored with 80 seconds remaining and Boston clinched a berth in the postseason with a 4-3 victory over Montreal after blowing all of a three-goal third-period lead in a Professional Women’s Hockey League regular-season finale at the Tsongas Center on Saturday. Fratkin’s winner, her second goal of the season, came with assists from Jessica Digirolamo and Susanna …
