The Mariners selected Fairchild's contract from Triple-A Tacoma on Thursday.
Fairchild will return to the big leagues to replenish the Mariners' outfield depth as Victor Robles moves to the family medical emergency list. Fairchild has logged just three hits in 19 at-bats in the majors this season and isn't likely to make much of an impact with Seattle. Brennen Davis (hamstring) was placed on the 60-day IL to open up a 40-man roster spot.