Mikko Rantanen assisted on Wyatt Johnston’s tiebreaking power-play goa l with 3:56 left before completing a third-period hat trick with an empty-netter as the Dallas Stars beat the Colorado Avalanche 4-2 in Game 7 on Saturday night to wrap up the first-round Western Conference playoff series. Rantanen, who was in the playoffs with the Avalanche the past seven seasons and part of their 2022 Stanley Cup title, had his second four-point period in the series. The Stars move on to the second round to face top-seeded Winnipeg or St. Louis, who play their own Game 7 on Sunday night.