Today marks the deadline for teams to submit to Major League Baseball their initial spring training player pools, which can comprise up to 60 players. Players are not eligible to participate in either a spring training or regular season game until they are included in the pool. Teams are free to change the makeup of the pools as they see fit. However, players removed from a team’s 60-man (for reasons unrelated to injury, suspension, etc.) must be exposed to other organizations via trade or waivers.
Not all players within a team’s pool are ticketed for MLB playing time, of course. Most teams will include well-regarded but still far-off prospects as a means of getting them training reps with no intention of running them onto a major league diamond this season. A comprehensive review of 2020’s unique set of rules can be found here.
The Mariners’ initial player pool consists of the following players.
Right-handed pitchers
- Austin Adams
- Dan Altavilla
- Gerson Bautista
- Brandon Brennan
- Isaiah Campbell
- Sam Delaplane
- Justin Dunn
- Carl Edwards Jr.
- Joey Gerber
- Logan Gilbert
- Kendall Graveman
- Zac Grotz
- Emerson Hancock
- Yoshihisa Hirano
- George Kirby
- Matt Magill
- Ljay Newsome
- Yohan Ramirez
- Erik Swanson
- Juan Then
- Taijuan Walker
- Art Warren
- Taylor Williams
- Brandon Williamson
Left-handed pitchers
- Nestor Cortes Jr.
- Aaron Fletcher
- Marco Gonzales
- Taylor Guilbeau
- Yusei Kikuchi
- Nick Margevicius
- Anthony Misiewicz
- Justus Sheffield
Catchers
Infielders
- J.P. Crawford
- Dee Gordon
- Sam Haggerty
- Tyler Keenan
- Shed Long
- Tim Lopes
- Jose Marmolejos
- Noelvi Marte
- Dylan Moore
- Kaden Polcovich
- Kyle Seager
- Austin Shenton
- Daniel Vogelbach
- Donovan Walton
- Evan White
- Patrick Wisdom
Outfielders