Hader earned the save in Friday's 3-1 win over the Mets, striking out two in a perfect ninth inning.
Brown (4-3) earned the win against the Mets on Friday, allowing one run on five hits and one walk with 10 strikeouts over 6.2 innings.
Canzone went 2-for-4 with a solo home run during the Mariners' 8-1 loss to the Blue Jays on Friday.
Hancock (7-8) took the loss against Toronto on Friday, allowing five runs on eight hits while striking out one batter over five innings. He did not issue a walk.
Sousa will serve as the opening pitcher during Saturday's game against the Mets, Chandler Rome of The Athletic reports.
Mariners manager Dan Wilson said Friday that Miller is being moved to the bullpen, Daniel Kramer of MLB.com reports.
Donovan (concussion) traveled with the Mariners to Toronto as his team begins a road trip, Daniel Kramer of MLB.com reports.
Smith is absent from the lineup for Friday's affair with the Mets.
Pena is in the lineup for Friday's matchup against the Mets, per Brian McTaggart of MLB.com.
Blubaugh earned a hold in Thursday's 5-1 win over the Yankees, allowing one hit while striking out three over two scoreless innings.
