The Seattle Mariners are promoting outfield prospect Lazaro Montes to the major leagues for the September portion of the schedule. Multiple reports say the move is expected to take effect with MLB roster expansion, placing the 21-year-old in position to contribute as Seattle pursues a late-season playoff push.
Reports identify Montes as a power-oriented bat, noting he has hit 38 home runs in the minors in 2026. One outlet also frames the call-up as an addition intended to bring “big swings” to the lineup. Other coverage cites prospect rankings from MLB Pipeline, describing Montes as Seattle’s No. 5 prospect and No. 56 overall.
While the outlets broadly agree on the promotion, they differ slightly on emphasis: some focus on his minor-league home run production and the timing of the roster expansion, while others highlight his prospect status and the expectation that he will be available once rosters expand to 28 players on the relevant date. One report also ties the debut expectation to a specific matchup window involving the Boston Red Sox.
