Garton fired a clean ninth inning in Monday's 6-2 loss to the Astros.
Garton needed just nine pitches to dispose of the potent trio of Jose Altuve, Carlos Correa and Josh Reddick. The 27-year-old right-hander has put together two perfect appearances with the Mariners thus far after a rough pair of stints with the Rays before being traded on Aug. 6. He'll serve as another bullpen option for manager Scott Servais for the balance of the regular season.