Wallstedt stopped 21 of 23 shots in Thursday's 5-2 win over the Stars in Game 6.
Wallstedt went 4-2 in the series with a 2.05 GAA and a .924 save percentage over six games. The Wild trailed for just 54 seconds in the decisive Game 6, and a clean third period from Wallstedt helped them secure advancement. It doesn't get any easier in the second round for the 23-year-old goalie, as he'll be tasked with stopping the Avalanche, who won the Presidents' Trophy for the best record in the regular season. A start date for that second-round series has yet to be announced.