Campbell was 17-3-2 with a 2.15 goals-against average, .921 save percentage and two shutouts in 22 games. He set an NHL record for victories to start a season by winning his first 11 games, breaking the mark of 10 straight set by Montreal's Carey Price in 2016-17.
Campbell was 4-1-1 with a 2.16 GAA and .918 save percentage in six games against the Canadiens this season.
"Really, both the results [Campbell] has got for us both in wins and saves," Maple Leafs coach Sheldon Keefe said Sunday. "The confidence he's had in himself and in turn the confidence our team has in him. He's done a terrific job."
Frederik Andersen started the season as Toronto's No. 1 but missed 24 of its final 25 regular-season games because of a knee injury. His lone appearance was a 4-3 overtime loss to the Ottawa Senators on May 12, when he made 24 saves.
"The other part of (the decision) is the circumstances surrounding Fred," Keefe said. "He hasn't played, and in that time Jack's played extremely well. He's definitely deserved the opportunity to play Game 1."
Andersen was 13-8-3 with a 2.96 GAA and .895 save percentage in 24 games this season (23 starts).
"I felt really good," Andersen said the loss to the Senators. "Some weird plays, some unfortunate bounces. Maybe that's rust. Maybe if I do a few things differently those are saves. But overall I felt really good."
Keefe said the Maple Leafs are comfortable with their goalie depth heading into the Stanley Cup Playoffs. Along with Campbell and Andersen, David Rittich was 1-1-1 with 2.72 GAA and .888 save percentage in four games (three starts) for Toronto since he was acquired in a trade with the Calgary Flames on April 12.
