The Marlins activated pitcher Henderson Alvarez (elbow) from the 15-day disabled list Sunday, designating pitcher Nick Masset for assignment in a corresponding move.
Alvarez made just two starts in April before hitting the disabled list with elbow tightness and shoulder inflammation. He threw six scoreless innings in a rehab game with Class A Jupiter Tuesday and will start Sunday against the Braves.
Alvarez is 0-2 with a 4.50 ERA and 5:1 K:BB ratio in 12 innings.