The Islanders have placed Johnny Boychuk (lower-body injury) on IR and recalled Sebastian Aho from Bridgeport of the AHL.
Boychuk has nine points this season (three goals, six assists) while posting a plus-2.
He had 24:57 of ice time during Wednesday night's game against the Sabres.
Aho, 21, was the Isles' fifth round pick during the draft in June. He has nine goals and 11 assists in 29 games this season for Bridgeport.
He is a "good puck mover" who "has shown a lot of smarts" this season, according to Art Staple of Newsday.