Garrett is starting Sunday's game against the Giants.
He was on the taxi squad and is listed as the confirmed starter. Garrett dealt with a shoulder impingement in early May and gave up two earned runs while striking out eight over 7.2 innings in his two most recent starts at Triple-A. The Marlins will likely give Garrett every chance to prove he belongs in the rotation going forward, especially with Max Meyer (elbow) on the shelf at Triple-A.