Roston has four goals and nine points in 49 games this season. The Islanders acquired him from the New Jersey Devils for Trent Hunter in July. He is in the final year of a four-year, $20.25 million contract the 39-year-old signed with New Jersey in 2008.
The Islanders recalled forward David Ullstrom to take his place. Ullstrom has two goals and four points in 14 games with the Islanders this season, as well as 19 goals and 23 points in 32 games with Bridgeport in the American Hockey League.
In other waiver wire news, the Columbus Blue Jackets claimed Darryl Boyce from Toronto, who was put on waivers Friday. Boyce has one goal and one assist in 17 games for the Maple Leafs this season.