Rookie goalie Jhonas Enroth stopped seven of Montreal's final eight shooters in the tiebreaker. He made 32 saves during the game, his first with the Sabres since Nov. 24, when he had 28 saves in a 1-0 loss to Pittsburgh.
Ryan Miller's streak of 31 consecutive starts in goal for Buffalo ended.
Jason Pominville tied it at 2 for Buffalo with his 13th goal 6:08 into the third. The Sabres won the shootout 4-3.
MAPLE LEAFS 4, BRUINS 3
In Boston, Mikhail Grabovski scored the tiebreaking goal with 1:01 remaining for Toronto.
Grabovski and former Bruin Phil Kessel both finished with two goals for Toronto, which fell behind 3-2 on Patrice Bergeron's 20th goal of the season.
Kessel's second goal tied it, and Grabovski's game-winner extended Boston's losing streak to three in a row.
SHARKS 2, PREDATORS 1
In Nashville, Tenn., Patrick Marleau beat Nashville goaltender Pekka Rinne on a one-on-one breakaway 3:43 into overtime.
Cody Franson scored in regulation for Nashville, and Devin Setoguchi tied it midway through the second period. The Predators took seven shots in the third period and the Sharks had 17, but neither team could find an opening.
FLYERS 4, LIGHTNING 3
In Tampa, Fla., Kimmo Timonen scored in the seventh round of the shootout and Philadelphia won a matchup of the top two teams in the Eastern Conference.