Stone was acquired with forward Tobias Lindberg in a trade with the Ottawa Senators on Monday for forward Oscar Lindberg, defenseman prospect Erik Brannstrom and a second-round pick in the 2020 NHL Draft to Ottawa. Stone, who has 62 points (28 goals, 34 assists) this season, will be on the second line with Max Pacioretty and Paul Stastny.
Vegas, which has lost 10 of its past 13 games (3-9-1), is six points ahead of the Arizona Coyotes for third place in the Pacific Division.
Captain Jamie Benn (upper body) will not play for the Stars, who hold the first wild card into the Stanley Cup Playoffs from the Western Conference and lead the Minnesota Wild and Colorado Avalanche by one point.