Mariners select Weston Wilson from Tacoma, designate Miles Mastrobuoni for assignment
Weston Wilson was up from Tacoma and in Seattle’s lineup at third base, while Miles Mastrobuoni was designated for assignment only nine days after returning from the injured list.
Seattle used Weston Wilson’s versatility to plug an immediate hole, selecting the 31-year-old infielder-outfielder from Triple-A Tacoma and sending Miles Mastrobuoni into DFA limbo in a move that kept the Mariners’ 40-man roster full. Wilson was in the starting lineup right away, batting ninth and playing third base, a clear sign the club sees him as more than a temporary name on the transaction wire.
The choice of Wilson over other Tacoma options fit the roster crunch Seattle is living through. Wilson is a right-handed hitter and right-handed thrower who can handle both the infield and outfield, giving the Mariners a multi-position bench piece at a time when the active roster has already been forced to absorb injuries and shuffling around Julio Rodríguez’s hamstring issue. That kind of flexibility matters when one extra player has to cover multiple lanes late in games.
Wilson arrived in the organization only days earlier, signing a minor league contract with Seattle on June 14 after clearing outright waivers and electing free agency rather than accepting an outright assignment to Triple-A Norfolk. He played in two games for Tacoma before being selected to the big-league roster, and his quick rise suggests Seattle valued the immediate depth and defensive coverage he could provide more than a longer look in the Rainiers’ lineup.
His big-league track record this season also made him a practical fit. Wilson appeared in 19 games for the Baltimore Orioles and hit .231, going 9 for 39 with a .348 on-base percentage in 46 plate appearances. That profile gives Seattle a bench bat with recent major-league experience, plus the ability to bounce around the diamond without forcing another roster move every time the lineup gets tweaked.
Mastrobuoni’s departure came just nine days after he was reinstated from the 60-day injured list on June 10. He had missed time with a right calf strain suffered while playing for Team Italy in the World Baseball Classic, so the DFA marked a rapid reversal for a player who had only just rejoined the Mariners’ roster. For Seattle, the swap underscored how fragile the bench picture has become: one utility player in, one utility player out, and a roster built around making short-term fixes look like long-term answers.
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