The Seattle Mariners lack impact on the mound in the organization — though it’s not entirely void of it — but they do have depth and some long-term upside plays. Such talents are reflected in this set of rankings.

MORE: Prospects Rankings Nos. 31-50

Friday: Nos. 16-20
— Rankings
— Abbreviated report

Saturday: Nos 11-15
— Rankings
— Abbreviated report

Sunday: Nos. 6-10
— Rankings
— Abbreviated report

February 10: No. 5
— Rankings
— Abbreviated report

February 11: No. 4
February 12: No. 3
February 13: Nos. 1-2
— Rankings
— Abbreviated Report

Get the full report right NOW, including tools grades by subscribing to Baseball Things here.

February 14: Why 1 over 2
— The differences in the Top 50

February 16: The Next Group
— Which prospects are on the brink of the Top 50

Here are Nos. 21-30 in reverse order, including their best tool, and 2020 projected starting assignment.

NO. PLAYER POS AGE BEST TOOL 2020 PROJ
30 Brayan Perez LHP 19 CB West Virginia (A)
29 Art Warren RHP 27 FB Seattle
28 Damon Casetta-Stubbs RHP 20 SL West Virginia (A)
27 Sam Delaplane RHP 25 CB Tacoma (AAA)
26 Jonatan Clase CF 17 RUN Arizona (R)
25 George Feliz CF 17 FIELD DSL (R)
24 Wyatt Mills RHP 25 FB Tacoma (AAA)
23 Yohan Ramirez RHP 25 FB Seattle
22 Aaron Fletcher LHP 24 FB Tacoma (AAA)
21 Joey Gerber RHP 23 FB Tacoma (AAA)

Last Updated on February 27, 2020 by Jason A. Churchill

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Jason A. Churchill

Churchill founded Prospect Insider in 2006 and spent several years covering prep, college and pro sports for various newspapers, including The News Tribune and Seattle PI. Jason spent 4 1/2 years at ESPN and two years at CBS Radio. He now serves as the Executive Copy Editor at Data Skrive, a tech company that manipulates data to provide automated content to clients including the AP, BetMGM, USA Today, and ESPN. Find Jason's baseball podcast, Baseball Things, right here.