Steven Stamkos had two goals and added an assist, and the Tampa Bay Lightning beat the visiting Montreal Canadiens, 4-2, Monday night in a matchup of the Atlantic Division's top teams.
Capitals 4, Sabres 3 - Evgeny Kuznetsov scored in regulation and the lone goal in the shootout to lead visiting Washington over last-place Buffalo.
Washington matched last season's win total.
The New York Rangers will be without veteran forward Martin St. Louis for 10 to 14 days because of a right knee ailment.
St. Louis was injured late in New York's 2-1 home victory over Florida on Sunday night.