Mariners’ roster shuffle continues: Christian Bergman selected from Tacoma

Christian Bergman in the bullpen during Mariners spring training, Saturday, Feb. 18, 2017, in Peoria, Ariz. (Ken Lambert / The Seattle Times)The Mariners continued shuffling their roster on Sunday: The club selected right-handed pitcher Christian Bergman from Class AAA Tacoma and sent right-handed pitcher Rob Whalen to Tacoma.

“Another day, another new guy,” manager Scott Servais said.

That’s the way it’s been for the Mariners this season, whether because or injuries or performance.

Bergman, 29, has impressive numbers with TAcoma this season: 2.17 ERA in five starts (He has a career 5.79 ERA in the majors). Bergman will serve as the Mariners’ long reliever and gives the team cover for lefty…