The Mariners recalled Davila from Triple-A Tacoma on Sunday.
After recently being optioned Aug. 21, Davila will rejoin the big-league club as they wrap up a pivotal three-game set in Toronto. The 27-year-old has appeared in 23 MLB games this season, registering a 4.10 ERA, 1.22 WHIP and 13:11 K:BB over 26.1 innings. Seattle sent Emerson Hancock (groin) to the 15-day injured list in a corresponding move.