ESPN MLB reports that NEW YORK -- The last-place New York Mets are making a change to their pitching rotation, demoting David Peterson to the bullpen and replacing him with fellow left-hander Sean Manaea.
It's a promotion for Manaea, who has been used mainly in long relief and mop-up duty this season after signing a $75 million, three-year contract in December 2024.
Peterson, an All-Star in 2025 before fading in the second half, is 3-5 with a 5.57 ERA this year.
He has made seven starts and five relief appearances but has been taking a regular turn, pitching several times in bulk relief following an opener.
Mets manager Carlos Mendoza said the 34-year-old will either start or pitch after an opener Monday night in Seattle.
"We're going to give him a chance here," Mendoza said Friday night before the series opener against the Miami Marlins.