Princeton’s David Hallisey scored the game-winning goal 18:32 into the third period to help the Tigers to a 4-3 win at St. Lawrence Saturday night. The Tigers led 2-0 after one period, but the Saints got goals from Michael Laidley and Ryan Garvey in a span of 29 seconds to tie the game early in the second. Ryan Lough gave the Saints the lead eleven seconds into the third, but Ryan Kuffner tied it for Princeton later in the period. Kuffner and Jackson Cressey each had a goal and an assist for Princeton, while Ryan Ferland made 19 saves. Arthur Brey had 34 saves for St. Lawrence. Princeton will be the seventh seed in the ECAC Hockey playoffs and host No. 10 Brown. St. Lawrence finished in last place and will travel to No.5 Dartmouth. Both best-of-three series start Friday night.