Seattle Mariners prospects
239 tracked players across 6 affiliates (ACL Mariners, Arkansas Travelers, DSL Mariners, Everett AquaSox, Inland Empire 66ers, Tacoma Rainiers). 168 have a real stat line or market evidence behind them. Everything below is measured; a module with nothing measured says so.
Trajectory changes from two seasons of official stat lines, ranked by size and credibility, then by quality. Not a hot week.
- 1
Ryan Sloanpromoted Low-A → Double-A · Missing more bats and walking fewer batters than last season, against better hitters — 21.8% to 27.6% K-BB after moving up to Double-A. That is the shape of a breakout. · 3+ yrs young for AA
Up stronglyMarket unread3+ yrs young for AABreakoutelite profile · 95/100 overall
Core 1st auto, numbered · $356.00 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 2
Pedro Da Costa Lemospromoted Low-A → High-A · Missing more bats and walking fewer batters than last season, against better hitters — 16.9% to 26.4% K-BB after moving up to High-A. That is the shape of a breakout.
Up stronglyMarket unread0.7 yrs old for High-ABreakoutsolid · 72/100 overall
No qualifying live listing found.
eBaySee live listings - 3
Carlos Jimenezpromoted Low-A → High-A · Hitting better than last season even though the pitching got harder — .777 to .926 after moving up to High-A. That is the shape of a breakout.
Up stronglyMarket unread0.7 yrs old for High-ABreakoutsolid · 71/100 overall
No qualifying live listing found.
eBaySee live listings - 4
Christian Littlepromoted Low-A → High-A · Missing more bats and walking fewer batters than last season, against better hitters — 16.0% to 19.6% K-BB after moving up to High-A. That is the shape of a breakout.
Up stronglyMarket unread0.7 yrs old for High-ABreakoutsolid · 67/100 overall
No qualifying live listing found.
eBaySee live listings - 5
Aiden Taurekpromoted Low-A → High-A · Hitting better than last season even though the pitching got harder — .813 to .901 after moving up to High-A. That is the shape of a breakout.
Up stronglyMarket unreadtypical age for High-ABreakoutsolid · 66/100 overall
No qualifying live listing found.
eBaySee live listings - 6
Brock Roddenpromoted Double-A → Triple-A · About the same as last season — .822 to .841 OPS.
Up stronglyMarket unread0.5 yrs old for AAABreakoutsolid · 66/100 overall
Measured improvement while young for the level or freshly promoted, on a rated player.
- 1
Ryan SloanKnocking on the door · promoted Low-A → Double-A · Missing more bats and walking fewer batters than last season, against better hitters — 21.8% to 27.6% K-BB after moving up to Double-A. That is the shape of a breakout. · 3+ yrs young for AA95overallElite
- 2
Pedro Da Costa Lemospromoted Low-A → High-A · Missing more bats and walking fewer batters than last season, against better hitters — 16.9% to 26.4% K-BB after moving up to High-A. That is the shape of a breakout.72overallStrong
- 3
Carlos Jimenezpromoted Low-A → High-A · Hitting better than last season even though the pitching got harder — .777 to .926 after moving up to High-A. That is the shape of a breakout.71overallStrong
- 4
Christian Littlepromoted Low-A → High-A · Missing more bats and walking fewer batters than last season, against better hitters — 16.0% to 19.6% K-BB after moving up to High-A. That is the shape of a breakout.67overallSolid
- 5
Aiden Taurekpromoted Low-A → High-A · Hitting better than last season even though the pitching got harder — .813 to .901 after moving up to High-A. That is the shape of a breakout.66overallSolid
- 6
Brock RoddenKnocking on the door · promoted Double-A → Triple-A · About the same as last season — .822 to .841 OPS.66overallSolid
Two or more years younger than the typical player at the level. Context, not a quality claim.
- 1
- 2
Lazaro MontesKnocking on the door · promoted High-A → Triple-A · About the same as last season — .959 to .940 OPS. · 3+ yrs young for AAA85overallStrong
- 3
Michael ArroyoKnocking on the door · promoted High-A → Triple-A · Down from .934 to .827 OPS, but he moved up to Triple-A — a step back at a harder level is normal. · 3+ yrs young for AAA80overallStrong
- 4
Colt EmersonKnocking on the door · promoted High-A → Triple-A · Down from .841 to .816 OPS, but he moved up to Triple-A — a step back at a harder level is normal. · 3+ yrs young for AAA79overallStrong
- 5
Felnin Celestenpromoted Low-A → Double-A · Down from .733 to .507 OPS, but he moved up to Double-A — a step back at a harder level is normal. · 3+ yrs young for AA53overallFringe
- 6
Yorger Bautistapromoted Rookie → Low-A · Down from .730 to .644 OPS, but he moved up to Low-A — a step back at a harder level is normal. · 3+ yrs young for Low-A52overallFringe
At a higher level this season than last, from the two official stat lines. Dates live in the catalyst tracker.
- 1
Will Armbruesterpromoted Rookie → Double-A · Down from 21.2% to 0.0% K-BB, but that came with a move up to Double-A — a step back at a harder level is normal.18overallLong shot
- 2
- 3
Jacob Dennerpromoted Rookie → High-A · Missing more bats and walking fewer batters than last season, against better hitters — 18.5% to 25.0% K-BB after moving up to High-A. That is the shape of a breakout.60overallSolid
- 4
- 5
- 6
Our all-round read on the player. Nothing in this list is a card price.
- 1
- 2
- 3
Jarvis Gomezmomentum 44/100 — steady rather than moving · 2.5 yrs young for Rookie82overallStrong
- 4
Kade AndersonKnocking on the door · 36.6% K-BB — misses bats and throws strikes81overallStrong
- 5
- 6
The development has moved further than the price of the benchmark card. Needs sold evidence on the card side, which most prospects do not have.
No measured lag on this club. 6 players are up strongly with no readable card market yet — waiting for market evidence, not lagging it.
Waiting: Ryan Sloan, Pedro Da Costa Lemos, Carlos Jimenez, Christian Little, Aiden Taurek, Brock Rodden.
Promotions, step changes and logged events on this club, each with its evidence grade.
- DERIVEDPromoted Low-A → Double-Adate not recordedFelnin Celesten
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → Double-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted High-A → Triple-Adate not recordedLazaro Montes
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted High-A → Triple-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis improving — baseball momentum 69/100 — ahead of the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Low-A → Double-Adate not recordedRyan Sloan
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → Double-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis improving — baseball momentum 90/100 — ahead of the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Low-A → High-Adate not recordedLuke Stevenson
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → High-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted High-A → Triple-Adate not recordedColt Emerson
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted High-A → Triple-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis improving — baseball momentum 69/100 — ahead of the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Low-A → High-Adate not recordedKorbyn Dickerson
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → High-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Double-A → Triple-Adate not recordedAxel Sanchez
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Double-A → Triple-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted High-A → Double-Adate not recordedJonny Farmelo
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted High-A → Double-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Double-A → Triple-Adate not recordedNick Raposo
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Double-A → Triple-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Double-A → Triple-Adate not recordedVictor Labrada
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Double-A → Triple-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Low-A → High-Adate not recordedCesar Quintas
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → High-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
- DERIVEDPromoted Low-A → High-Adate not recordedCurtis Washington Jr.
Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
Why it matters
- What happened
- Promoted Low-A → High-A. Level changed between his 2025 and 2026 stat lines (MLB Stats API, official). The date of the move is not recorded here.
- Why it matters
- A promotion is the club's own read of the player, and the level a card was made at is the level the hobby prices it against. Each rung up is a re-rating event.
- What changed in the thesis
- Thesis intact — baseball momentum 41/100 — tracking the thesis.
- Has the card market responded?
- Cannot say: card-price momentum is unmeasured — no earlier observation of the same benchmark series to difference against. No sold evidence means no market response to read, and a listing's asking price is not one.
- What to watch next
- Whether the strikeout and walk rates hold at the new level over a real sample — the first 100 plate appearances say little.
Best Bowman cards
6Each player's benchmark card — the one standardized card we track his market on — with how firmly we know it is his.
Buyable right now
6Players on this club with a best-fit live listing in the store — fit first, never cheapest first.
- 1Up stronglyMarket unread3+ yrs young for AABreakout
elite profile · 95/100 overall
Core 1st auto, numbered · $356.00 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 2
Colt Emersonpromoted High-A → Triple-A · Down from .841 to .816 OPS, but he moved up to Triple-A — a step back at a harder level is normal. · 3+ yrs young for AAA
DownMarket unread3+ yrs young for AAAstrong prospect · 79/100 overall
Core 1st auto, numbered · $206.50 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 3
Jonny Farmelopromoted High-A → Double-A · Down from .778 to .659 OPS, but he moved up to Double-A — a step back at a harder level is normal. · 2.8 yrs young for AA
DownMarket unread2.8 yrs young for AAsolid · 60/100 overall
Core 1st auto, numbered · $288.98 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 4
Jared SundstromAbout the same as last season — .671 to .685 OPS.
Up stronglyMarket unread1.2 yrs old for AAfringe · 38/100 overall
Core 1st auto, numbered · $21.90 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 5
Ryan BlissDown from 1.115 to .717 OPS this season — but last season was a small sample, so go easy on it. (prior season only 18 PA — a soft read)
DownMarket unread0.5 yrs old for AAAfringe · 37/100 overall
Core 1st auto, numbered · $16.68 delivered
title claims 1st — not verified · no valuation · best offer
See listing - 6
Brendan Donovansteady profile; no fresh signal
UnmeasuredMarket unreadold for AAAlong shot · 29/100 overall
Core 1st auto, numbered · $350.00 delivered
title claims 1st — not verified · no valuation · best offer
See listing
Every Seattle Mariners prospect we track
Best-rated first. Players with a page of their own link to it; the rest are followed and appear as data lands.
- Ryan Sloan
- Lazaro Montes
- Jarvis Gomez
- Kade Anderson
- Michael Arroyo
- Colt Emerson
- Juan Rijo
- Gregory Pio
- Pedro Da Costa Lemos
- Chris Diaz
- Carlos Jimenez
- Carlos Vargas
- Fabian Gonzalez
- Angel Chicuate
- Adan Vallenilla
- Kelvin Alcantara
- Christian Little
- Aiden Taurek
- Brock Rodden
- Gleiner Diaz
- Jackson Steensma
- Luke Stevenson
- Ace Reese
- Boston Smith
- Brennen Davis
- Anderson Guevara
- Elias Perez
- Hayden Yost
- Axel Sanchez
- Korbyn Dickerson
- Diego Contreras
- Jacob Denner
- Colton Shaw
- Jonny Farmelo
- Juan Cazarez
- Santiago Pereira
- Lucas Kelly
- Leonardo Reynoso
- Sebastian De Andrade
- Charlie Pagliarini
- Gunner Mayer
- Po-Chun Lin
- Caleb Franzen
- Jo Oyama
- Matt Brash
- Maikol Rodriguez
- Edgardo Toro
- Casey Hintz
- Henry Ford
- Josh Caron
- Gabriel Guanchez
- Brandon Eike
- Cole Wilcox
- Felnin Celesten
- Ferny Barreda
- Yorger Bautista
- Nick Garcia
- Nick Raposo
- Cal Raleigh
- Victor Labrada
- Daniel Alana
- Erick Lanza
- Jose Zerpa
- Ricardo Cova
- Stuart Fairchild
- Reid Easterly
- Hunter Fitz-Gerald
- Jake Brown
- Mason Peters
- Estevan Moreno
- Randal Munoz
- Cesar Quintas
- Houston Roth
- Leandro Romero
- Dawel Joseph
- Luis Suisbel
- Domingo Gonzalez
- Francisco Pazos
- Matthew Ellis
- Ambeiro Recio
- Starlin Aguilar
- Curtis Washington Jr.
- Colin Davis
- Dalton Davis
- Nick Becker
- Sam Whiting
- Grant Jay
- Connor Charping
- Calvin Schapira
- Martin Gonzalez
- Joshua Francis
- Cooper Criswell
- Kendry Martínez
- Leo Rivas
- Mason Eckelman
- Jose Geraldo
- Ryan Wynn
- Robinson Ortiz
- Marcelo Perez
- Jean Munoz
- Josh Simpson
- Konni Durschlag
- Roberto Perez
- Nolan Jones
- Austin St. Laurent
- Jhonny Pereda
- Blake Rambusch
- Josh Hood
- Magz German
- Jared Sundstrom
- Troy Taylor
- Miles Mastrobuoni
- Anthony Donofrio
- Scott Rouse
- Ryan Bliss
- Spencer Packard
- Aneury Lora
- Chase Centala
- Evan Truitt
- Cesar Farias
- Manuel Almeida
- Jack Bowery
- Carter Dorighi
- Dervy Ventura
- Wyatt Queen
- Sean Hermann
- Will Wilson
- Jimmy Kingsbury
- Anthony Karoly
- Teddy McGraw
- Willie MacIver
- Adam Maier
- German Fajardo
- Caleb Cali
- Wisler Infante
- Cristian Aray
- Dylan Wilson
- Thomas Higgins
- Alex Hoppe
- Peyton Alford
- Carson Taylor
- Osvaldo Platas
- German Arvayo
- Sammy Siani
- Dustin Crenshaw
- Jakson Reetz
- Brendan Donovan
- Reese Lumpkin
- Ty Cummings
- Adalberto Vallenilla
- Connor Wilford
- Victor Robles
- Eduardo Ponce
- Jose Romero
- Walter Ford
- Ryan Picollo
- Aaron McKeithan
- Danny Macchiarola
- Adam Leverett
- Bill Knight
- Jose Gabriel Torres
- Michael Morales
- Charlie Sutherland
- Eduardo Uscanga
- Kyle Boylston
- Wyatt Lunsford-Shenkman
- Charlie Beilenson
- Brady O'Brien
- Taylor Dollard
- George Feliz
- Manuel Baez
- Nolan Kingham
- Connor Dykstra
- Aiden Butler
- Bryant Mendez
- Similien Senatus
- Trevor Lucas
- Hogan Windish
- Alan Carpinteiro
- Ray Cebulski
- Eric Jeon
- Abdiel Mendoza
- Michael Plassmeyer
- Brayden Corn
- Bryce Miller
- Danery Meyer
- Cristian Alvarado
- Troy Watson
- Adam Smith
- Christopher Quiroz
- Henry Alcantara
- Jesus Rondon
- Kleiver Benitez
- Anderson Jimenez
- Wuilliams Rodriguez
- Will Armbruester
- Maximo Rodriguez
- Michael Hobbs
- Nico Tellache
- Kendal Meza
- Carlos Gonzalez
- Nick Davila
- Kevin Pino
- Carlos Martinez
- Nick Hull
- Seth Shuman
- Mathias Sato
- Mario Vasquez
- Cole Cheatham
- Ryan Hawks
- Jason Ruffcorn
- Darwin Ramos
- Henry Kaczmar
- Michael Petite
- Stefan Raeth
- Reid VanScoter
- Tyler Cleveland
- Anthony Treto
- Chris Torres
- Connor Marshburn
- Drew Whalen
- Nathan Taylor
- Deuri Castillo
- Ruben Ramirez
- Gabe Mosser
- Gabriel Hidalgo
- Ismanuel Piña
- Jhonathan Díaz
- Jack White
- Brendan White
- Jake Harvey
- Jacob Galloway
- Dominic Castellano
- Gabriel Sosa
- Ben Hernandez
- Daniel Ouderkirk
- Grant Knipp
- Isaac Thornton
- Matthew Matthijs
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