BALTIMORE -- Right-hander Christian Bergman, who started eight games for the Mariners earlier this season, was selected from Triple-A Tacoma before Monday's 7-6 loss to Baltimore to reinforce the club's bullpen heading into the final series of a 12-game road trip.
Bergman pitched two innings in relief on Monday, allowing one run on five hits. He entered in the fourth inning and was able to work out of a bases-loaded jam after starter Marco Gonzales ran into some trouble.
Dan Altavilla, who pitched three innings in Sunday's 10-1 loss to the Yankees, was optioned back to Tacoma.
Bergman was designated for assignment on Aug. 15 and then outrighted to Tacoma a day later after clearing waivers, so he needed to be added back onto the 40-man roster with Monday's move. That puts the 40-man roster at 39 players.
In four Major League seasons with Colorado (2014-16) and Seattle ('17), Bergman is 11-13 with a 5.56 ERA in 66 games, including 23 starts.
"He's done a really nice job for us," Servais said. "Outside of a couple rough starts he had early in May, he's been really good. We trust him. He throws strikes, goes right after 'em and has enough to get people off the barrel and get outs at this level."
Altavilla, 24, pitched a career-high three innings and threw 45 pitches while allowing four hits and two runs after replacing starter Andrew Albers on Sunday. He is 1-1 with a 5.19 ERA, 40 strikeouts and 17 walks in 34 2/3 innings over 31 relief appearances on the year.