Mathew Barzal created a turnover by checking Matt Duchene deep in the Islanders' zone before dishing to Horvat, who descended upon Scott Wedgewood and went to the backhand to snap the Islanders' four-game losing streak.
Lane Lambert was fired as the Islanders' coach on Saturday and was replaced by Roy, the Hall of Fame goaltender who hadn't coached in the NHL since his three-season stint with the Colorado Avalanche ended in 2016. Alexander Romanov and Hudson Fasching also scored for the Islanders, while goalie Ilya Sorokin made 40 saves.
Jason Robertson and Nils Lundkvist scored in the second period for the Stars, who lost for the third time in eight games (5-2-1). Wedgewood recorded 24 saves.
Wild 5, Hurricanes 2
Kirill Kaprizov scored three times to record his third career hat trick as Minnesota topped Carolina in Raleigh, N.C.
Joel Eriksson Ek and Jake Middleton also scored and Filip Gustavsson made 40 saves for the Wild, who have won three of their past four. Eriksson Ek also had a pair of assists, as did Brock Faber. Kaprizov has five goals in the past two games.
Martin Necas and Michael Bunting scored for the Hurricanes, who went 3-2-1 on a six-game homestand. Goalie Antti Raanta stopped 14 shots in a game that Carolina seemed to dominate at times. The Hurricanes, who went 0-for-4 on power plays, lost for just the third time in their past 11 games.
Maple Leafs 3, Kraken 1
Auston Matthews scored his NHL-leading 38th goal of the season as Toronto wrapped up a four-game Western trip with a victory at Seattle.
Nicholas Robertson and Jake McCabe also tallied for Toronto, which won for just the second time in its past seven games (2-4-1). Much-maligned goaltender Ilya Samsonov made 16 saves to earn his first victory in six appearances since Dec. 9.
Jordan Eberle scored for Seattle, which suffered its fourth straight loss following franchise-record streaks of nine consecutive wins and points in 13 games in a row (11-0-2). Joey Daccord stopped 23 of 25 shots.
Red Wings 2, Lightning 1
Alex Lyon made 27 saves to lead Detroit to a win over visiting Tampa Bay.
Lucas Raymond and Daniel Sprong each scored a goal for the Red Wings, who are 7-1-1 in their past nine games. Victor Hedman scored the lone goal for Tampa Bay, which saw a five-game winning streak come to an end.
Detroit took a 2-1 lead with 11:02 left in the second period on a goal by Sprong, who picked up a loose puck at center ice, skated in all alone on the Lightning goal and beat Andrei Vasilevskiy (33 saves) to the glove side. The Lightning had a six-on-four situation with 12 seconds remaining but couldn't get the equalizer before time ran out.
Rangers 5, Ducks 2
Artemi Panarin scored the go-ahead goal with 5:37 remaining to highlight a four-goal third period for New York, which rallied to beat host Anaheim.
Chris Kreider had a goal and two assists and Vincent Trocheck, Will Cuylle and Jimmy Vesey also scored for New York, which snapped a five-game road losing streak. Igor Shesterkin made 16 saves as the Rangers moved four points ahead of the second-place Philadelphia Flyers in the Metropolitan Division.
Adam Henrique scored two goals and Troy Terry and Leo Carlsson each had a pair of assists for Anaheim, which lost its sixth straight home game. Lukas Dostal finished with 28 saves.
Senators 5, Flyers 3
Tim Stutzle scored two goals as Ottawa rallied past host Philadelphia.
Zack MacEwen, Claude Giroux and Vladimir Tarasenko each added one goal and Mads Sogaard made 22 saves as the Senators halted a five-game road losing streak. Ottawa scored three times in the third period to take over.
Egor Zamula had two goals and one assist while Joel Farabee added one goal and two assists for the Flyers. Samuel Ersson stopped 29 shots.
