Seattle Mariners Top Prospects

Pipeline capture 2026-10-276 ranked in the Top 100Top 15 in-house grades shown20-80 scouting scale

Every MLB Pipeline Top 100 ranking in the Mariners system for 2026, next to Legends Deck's in-house 20-80 future-value grades computed from the 2026 minor-league lines we hold. The Mariners board below adds our highest-graded players whether or not Pipeline ranks them.

Pipeline Top 100, Mariners system6 of ranks 1-100

Seattle Mariners players in the MLB Pipeline editorial Top 100 for 2026, with in-house FV grades
Rank	Player	Pos	Age	Our FV	Level
5	Kade Anderson	LHP	22	68	AA
11	Ryan Sloan	RHP	20	59	AA
41	Michael Arroyo	SS	21	—	—
53	Lazaro Montes	RF	22	—	—
60	Felnin Celesten	SS	21	59	A_PLUS
83	Jonny Farmelo	OF	22	51	A_PLUS

Grades follow the same formula everywhere on this site: production and age versus level, on the 20-80 scouting scale. See the full methodology on the prospects hub. Pipeline's ranking is editorial content from MLB Pipeline captured 2026-10-27; it is not StatsAPI-licensed data.

In-house FV board, Marinerstop 15 of 86

Top 15 in-house future-value grades in the Mariners system, 2026
Rank	Player	Pos	Level	Age	FV
1	Kade Anderson	P	AA	21	68
2	Felnin Celesten	SS	A_PLUS	20	59
3	Ryan Sloan	P	AA	20	59
4	Mason Peters	P	A	22	58
5	Casey Hintz	P	A_PLUS	22	51
6	Jonny Farmelo	OF	A_PLUS	21	51
7	Gleiner Diaz	P	A	22	50
8	Patrick Wisdom	3B	AAA	34	50
9	Colton Shaw	P	A_PLUS	23	49
10	Luke Stevenson	C	A_PLUS	21	49
11	Josh Caron	C	A_PLUS	22	48
12	Reid Easterly	P	A_PLUS	24	47
13	Troy Taylor	P	AAA	24	47
14	Christian Little	P	A_PLUS	22	46
15	Jack Bowery	P	A	22	46