The Penobscot Pioneers erupted for four third-period goals and handed Cheverus/Old Orchard Beach/Kennebunk/Windham its first loss of the season Thursday night, beating the Stags 5-3 in a girls’ hockey game at Troubh Ice Arena.

Jordin Williams tied the game at 2-2 two minutes into the third, then scored a 5-on-3 goal at 5:06. After Emma McNeil added a power-play goal, Lucy Johnson drew Cheverus (10-1) within one, but Williams iced it with an empty netter in the final minute.

The Stags, ranked No. 1 in the Varsity Maine poll, took a 2-0 lead on goals from Mikayla Talbot and Brynn McKenney in the first period. Third-ranked Penobscot (7-3-1), a co-op team with players from Brewer, Bangor, Hampden Academy, Hermon, John Bapst, Old Town and Orono, got on the board when McNeil scored in the second period.