New York Islanders netminder Jaroslav Halak will miss a minimum of six weeks after suffering an injury in Tuesday's win over the Pittsburgh Penguins, the team announced.

Backup Thomas Greiss will start Wednesday night versus the Toronto Maple Leafs, and shoulder the bulk of the duties down the stretch with Halak out for at least the rest of the regular season.

Greiss has been quite useful for the Islanders in what's been the busiest campaign of his seven-year career. He owns a .930 save percentage in 29 total appearances, with 18 wins to his credit.

Halak suffered the apparent lower-body injury late in what proved to be his 200th NHL win when he made a push to get in position to defend a shot from Penguins defenseman Trevor Daley.

New York has a five-point lead and two games in hand on the Penguins for the final guaranteed postseason spot in the Metropolitan Division.

Jean-Francois Berube represents the Islanders' third option in goal.

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