Mariners Set to Call Up Power Prospect Lazaro Montes
The 21-year-old Cuban slugger is en route to Boston and expected to be activated Tuesday, coinciding with the September 28-man roster expansion.
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Seattle Mariners market desk for 2026-08-31: lineup state, starter context, market drift, player signals, and source-linked news in one club view.
Mariners · L4 · COOLING · CURRENT_STREAK, Team streak 4.00, 4 GAMES
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6:45 PM EDT
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Payton Tolle · LHP
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Open full Mariners Wire →Mariners Calling Up Top Prospect Lazaro Montes, per Report
Seattle is set to call up highly regarded slugger Lazaro Montes to the MLB roster, per Daniel Kramer, with his debut targeted for Tuesday in Boston.
Lazaro Montes Set for MLB Debut with Mariners on Tuesday
Seattle promotes its 56th-ranked prospect to the active roster amid a roster expansion, with an additional 40-man move still needed.
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Market snapshot.
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Market diary · today
- Game scheduledFirst pitch 6:45 PM EDT · Away @ Boston Red Sox
- Lineup pendingCard opens ~1-2 hrs pregame. Player markets may move on lineup post.
- Probable starter confirmedPayton Tolle (LHP) · FIP 3.17
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Probable starter · George Kirby
04 / Postseason outlook
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A living projection of the division and wild-card race. Posterior simulates the remaining regular-season schedule from current record and run-differential strength, then re-seeds every division and wild-card field on each run.
Current position
64–73
No. 3 in AL West · L4
.467
5 games back
7.4%
Win division
0.8%
Wild card
8.3%
Make postseason
77.1
Projected wins
Division race
October = postseason probability
ClubWLGBOct
HOU
TEXSEA
ATH
LAAPosterior schedule-aware Monte Carlo · empirical-Bayes strength from record and run differential · 10,000 simulations · as of Aug 31, 11:51 AM EDT · max simulation SE ±0.5pp · estimate, not certainty or a bet
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Roster MLB Stats APIMatched Aug 31, 2:18 PM EDT
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Open the Mariners Clubhouse →- Seattle holds a club option on Andrés Muñoz for 2027. Should the Mariners exercise it?3 options · Closes Nov 5, 2026
- What is the Seattle Mariners' largest roster need heading into the 2026-27 offseason?5 options · Closes Nov 5, 2026