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Pitchers
- -- Cade Anderson
- 21 Juan Cazarez
- -- Reid Easterly
- 26 Anderson Guevara
- -- Griffin Hugus
- -- Anthony Karoly
- -- Lukas Kelly
- -- Po-Chun Lin
- -- Isaac Lyon
- -- Danny Macchiarola
- 53 Kendal Meza
- 16 Francisco Pazos
- -- Roberto Perez
- -- Mason Peters
- 44 Ruben Ramirez
- -- Dusty Revis
- 36 Wuilliams Rodriguez
- -- Colton Shaw
- -- Jackson Steensma
- 9 Dylan Wilson
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Catchers
- 8 Sebastian De Andrade
- 14 Carlos Gonzalez
- -- Luke Heyman
- -- Grant Jay
- 15 Eduardo Ponce
Infielders
- -- Nick Becker
- 10 Dalton Davis
- 22 Martin Gonzalez
- 7 Bryant Mendez
- -- Estevan Moreno
- -- Brady O'Brien
- 3 Jo Oyama
Outfielders
- 6 Kelvin Alcantara
- -- Brayden Corn
- -- Korbyn Dickerson
- -- Konni Durschlag
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Manager
- -- Luis Matias
- -- Rico Reyes
Coaches
- 7 Chase Miller (hitting)
- 22 Bryan Pall (pitching)
- -- Sergio Plasencia (coach)
- -- Chase Wullenweber (bench)
60-day injured list
- -- Gregori Arrieche
- -- Thomas Higgins Jr.
- -- Juan Jiminez
- -- Ruddy Navarro (full season)
- -- Daniel Ouderkirk
- -- Cole Phillips
- -- Juan Pinto (full season)
- -- Eduardo Uscanga
 7-day injured list
* On Seattle Mariners 40-man roster
~ Development list
# Rehab assignment
∞ Reserve list
‡ Restricted list
§ Suspended list
† Temporarily inactive list
Roster updated August 12, 2025
Transactions
→ More rosters: MiLB • Arizona Complex League
→ Seattle Mariners minor league players
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