Garrett has joined the Marlins as part of their taxi squad and will likely start Sunday's game against the Giants, Craig Mish of SportsGrid.com reports.
Garrett was shut down for a month at Triple-A Jacksonville due to a left shoulder injury, but he returned to action May 21. The southpaw allowed a hit and no walks while striking out three in five scoreless innings against Triple-A Scranton/Wilkes-Barre last Sunday and will likely draw his first major-league start of the season Sunday. Elieser Hernandez was optioned to Triple-A on Saturday, so Garrett should have a chance to remain in Miami's rotation.