
He recorded career highs in starts (58) and wins (23) during the 2016-17 season.
Incumbent goaltender Thomas Greiss struggled last season, posting a 13-8-2 record with a 3.82 goals-against-average and a .892 save percentage.
The Islanders have remained busy this offseason after John Tavares signed for the Toronto Maple Leafs.
Graziano: Tavares Leaves Islanders And Fans With Unanswered Questions
Lehner, Leo Komarov, Valtteri Filppula and Tom Kuhnhackl are among the Islanders' notable free agent signings. Matt Martin was re-acquired from the Toronto Maple Leafs on Tuesday in exchange for goaltender Eamon McAdam.
Calvin De Haan will not be returning. The 27-year-old defenseman signed signed a four-year, $18.2 million contract with the Carolina Hurricanes on Tuesday.