Cantillo will be out for 8-to-10 weeks due to a left hamstring strain he sustained at the end of spring training, Mandy Bell of MLB.com reports.
The Guardians optioned Cantillo to Triple-A Columbus on Tuesday, Mandy Bell of MLB.com reports.
Cantillo allowed a run on a hit and a walk over two innings in Wednesday's Cactus League start versus the Diamondbacks.
The Guardians promoted Cantillo from Double-A Akron to Triple-A Columbus on Wednesday, Zack Meisel of The Athletic reports.
Cantillo was optioned Sunday to Triple-A Columbus by the Guardians, Mandy Bell of MLB.com reports.
Cantillo (shoulder) completed a throwing session last week on the back fields at the Guardians' minor-league camp, SI.com reports.
Double-A Akron reinstated Cantillo (abdomen) from its 7-day injured list Monday.
Cantillo (abdomen) made his first rehab appearance in the Arizona Complex League on Friday, allowing a hit and a walk while striking out two over two scoreless innings.
Cantillo was placed on the seven-day injured list with abdominal soreness Saturday.
Cantillo has one of six players sent from San Diego to Cleveland on Monday in the Mike Clevinger deal, Ken Rosenthal of The Athletic reports.