Mariners acquired LHP Zach Muckenhirn from the Mets for RHP Chris Flexen and RHP Trevor Gott.
Muckenhirn heads to Triple-A Tacoma to bolster Seattle’s left-handed relief depth for the remainder of the season, and still has a couple years of team control remaining as well. The 28-year-old lefty has made three relief appearances in the majors this season, allowing four runs on 11 hits with a 3/2 K/BB ratio over six innings of work.