Forward Andrew Ladd had surgery in March to repair a torn ACL in his left knee, and his recovery is "more black and white," Lamoriello said, with a timeline of 5-6 months that would take him close to training camp.
Ladd played in 26 games this season and had 11 points (three goals, eight assists).
The Islanders signed unrestricted free agent center Brock Nelson to a six-year contract May 23, but three others -- forwards Anders Lee and Jordan Eberle, and goalie Robin Lehner -- can become a UFA on July 1. On Friday, New York agreed to terms on a two-year contract with center Tanner Fritz, who also could have become a UFA on July 1. Fritz played eight games with the Islanders this season before having surgery to remove a blood clot from his hand.
"We want all our free agents back, we're going to work as hard as we can to get it to come about," Lamoriello said.
The GM said New York will make a qualifying offer to 23-year-old restricted free agent forward Joshua Ho-Sang, a first-round pick (No. 28) in the 2014 NHL Draft who played 10 games and had two points (goal, assist) with the Islanders but played the rest of this season with Bridgeport of the American Hockey League.