It was Anderson's fourth shutout of the season and the second he's had in his first game back after personal leave. Anderson made 37 saves in a 2-0 win against the Edmonton Oilers on Oct. 30 after he left the Senators following the announcement that his wife had cancer.
"Felt great. Got two points, got the win," Anderson said. "I think it was an exciting day for myself to get back in the net and just be there for the guys, feel that camaraderie.
Thomas Greiss made 21 saves for the Islanders (24-19-10), who lost in regulation for the second time in their past 12 games (8-2-2). The Islanders are 7-2-2 under coach Doug Weight, who replaced Jack Capuano on Jan. 17.
"I think [Anderson] saw a lot," Weight said. "He played well. We weren't complete. We were missing a couple of pieces on a couple of lines. It wasn't like we've been playing, a lot of confidence. We played hard, but we need everybody pulling the rope every game if we're going to be successful in this league. It's a tough place to play. They've been confident lately and playing well, and they got a little jolt getting Craig back.
"We put some shots up, had some Grade A [chances]. We just couldn't bury it and the ice kind of tilted."
Stone put Ottawa ahead 1-0 at 4:10 of the first period.
The Senators scored on two of their five shots in the second period, each on a 2-on-1. Smith made it 2-0 at 4:35 and Pageau converted Pyatt's saucer pass at 7:12.