ST. LOUIS -- Carlos Carrascowas shifted to the 60-day injured list by the New York Mets on Thursday, a surprise move that pushes back his season debut until May 28 at the earliest.

The 34-year-old right-hander has been sidelined by an injured right hamstring since spring training and had been making progress. He threw a simulated game Tuesday at the Mets' spring training complex in Port St. Lucie, Florida, and the team said Wednesday that Carrasco was starting a minor league injury rehabilitation assignment this weekend.

Manager Luis Rojas did not mention Carrasco's status change when he spoke with reporters before Thursday's game against St. Louis, and the Mets sent a release later announcing the move to the 60-day IL.

Right-hander Jordan Yamamoto was optioned to Triple-A Syracuse, and the Mets selected the contract of right-hander Tommy Hunter from the Triple-A farm team.

Carrasco was acquired in January from Cleveland along with All-Star shortstop Francisco Lindor. He was put on the 10-day IL on April 1, a move retroactive to March 29.