The New York Mets continued their flurry of offseason moves by dealing right-handed pitcher Cooper Criswell to the Seattle Mariners just days after completing a major trade for starter Freddy Peralta.
After landing Peralta from the Milwaukee Brewers earlier in the week, the Mets made another roster adjustment on Friday, this time moving a pitcher out of the organization. According to ESPN’s Jorge Castillo, New York sent the 29-year-old Criswell to Seattle in a transaction that clears roster space for their newly acquired ace. Criswell had recently been designated for assignment, making him a logical trade piece.
“The Mariners have acquired Cooper Criswell from the Mets,” a source told ESPN, confirming the deal.
Criswell spent the previous two seasons with the Boston Red Sox and was claimed off waivers by the Mets just days earlier. His stay in New York was brief, as the club quickly flipped him to Seattle. Over his major-league career, Criswell has posted a 4.48 ERA and a 1.435 WHIP, striking out 113 batters across 154.2 innings.
The move is another example of how aggressive the Mets’ front office has been this offseason. In addition to acquiring Peralta, New York has added several impact players to the major-league roster, including infielder Bo Bichette, outfielder Luis Robert Jr., and closer Devin Williams. After missing the postseason in 2025, the Mets appear fully committed to making a serious push in 2026.
Peralta, 29, is expected to anchor the Mets’ rotation. The two-time All-Star is coming off what many consider the best season of his eight-year career. In his final year with Milwaukee, he recorded a career-low 2.70 ERA and a 1.075 WHIP while setting personal highs in innings pitched (176.2) and strikeouts (204), solidifying his status as one of baseball’s premier starters.
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