The Mariners reassigned Buchter to minor-league camp Tuesday.
The demotion of outfielder Taylor Trammell to Triple-A Tacoma and reassignments of Buchter and right-hander Matt Festa leave the Mariners with 42 players left at big-league camp as Opening Day approaches. Buchter spent the 2021 campaign in the Diamondbacks organization, appearing in 18 games for the big club and logging a 6.61 ERA over 16.1 innings.