The Guardians optioned Curry to Triple-A Columbus on Wednesday, Joe Noga of The Cleveland Plain Dealer reports.
Curry allowed two hits and one walk over five scoreless innings but did not factor into the decision during Monday's 6-0 win over the Red Sox. He struck out three.
Curry (illness) was activated from the 15-day injured list Monday.
The Guardians will activate Curry (illness) from the 15-day injured list to start Monday's game against the Red Sox, Mandy Bell of MLB.com reports.
Curry (illness) struck out one and allowed one earned run on five hits and three walks over 4.1 innings in his second rehab start with Triple-A Columbus on Wednesday.
Curry (illness) allowed a hit and a walk while striking out seven over 2.2 innings in his rehab start Thursday versus Triple-A Omaha.
The Guardians placed Curry on the 15-day injured list Thursday with a viral illness.
Curry has allowed four runs on eight hits while striking out four and walking none over eight innings across three Cactus League appearances.
Curry (3-4) allowed an unearned run and walked two batters over one-third of an inning, taking the extra-inning loss versus the Giants on Wednesday.
Curry made a relief appearance in Saturday's 6-2 loss to the Angels, giving up two earned runs on three hits and one walk over one inning while failing to strike out a batter.