Ovechkin's power-play goal with 2:06 remaining came on a one-timer from the left circle that got past goaltender Ryan Miller. It was Ovechkin's 23rd power-play goal of the season and started the Capitals on their way to a 4-1 victory.
"It means a lot," said Ovechkin, whose single-season high is 65 goals, set in 2007-08. "That's a big number, and it's going to be there my whole life."
Ovechkin joins Steve Yzerman, Brett Hull, Bobby Hull, Phil Esposito and Pavel Bure as players to have five 50-goal seasons. Mike Bossy and Wayne Gretzky lead the NHL with nine, followed by Marcel Dionne, Guy Lafleur and Mario Lemieux, each of whom had six.
Ovechkin has 421 goals in 676 NHL games.