Toronto Blue Jays right-hander Dylan Cease has been placed on the 15-day injured list after suffering a left hamstring strain, manager John Schneider said Tuesday.
Cease left Sunday's loss to the Pittsburgh Pirates in the fifth inning after suffering the injury, which is being described as mild.
Schneider and head athletic trainer Jose Ministral came to the mound in the top half of the inning after Cease shook his leg several times between pitches. Cease stayed in to retire Spencer Horwitz but was then replaced by left-hander Mason Fluharty.
Cease has a 3-3 record with a 3.05 ERA so far in his first season with Toronto after signing a $210 million, seven-year contract. He has made at least 30 starts in each of the past five seasons, one of just four big league pitchers to do so.
Slugger Vladimir Guerrero Jr., who left Sunday's game in the bottom of the fifth inning with a right elbow contusion after he was hit with a pitch, was not in the starting lineup for Monday's game against the Miami Marlins.
Earlier Monday, Toronto reinstated outfielder Nathan Lukes from the 10-day injured list and made him available for the series opener against the Marlins. He had been out since April 24 with a left hamstring strain.
Lukes is batting .250 with eight RBIs with Toronto this season.
Toronto optioned infielder/outfielder Davis Schneider to Triple-A Buffalo in a corresponding move.
The Blue Jays entered Monday's game in third place in the American League East with a 25-28 record.
The Associated Press contributed to this report.