After the trades of Mike Zunino, James Paxton, James Pazos, Edwin Diaz and Robinson Cano, the Seattle Mariners have greatly improved their farm system.

Here’s a quick look at the Top 15 Prospect Rankings as of December 13, 2018. Players in bold acquired after the 2018 season. Player in italics acquired in the last 365 days.

1 Justus Sheffield LHP 22 FB
2 Jarred Kelenic CF 20 HIT
3 Julio Rodriguez RF 17 POWER
4 Justin Dunn RHP 23 FB
5 Kyle Lewis CF 23 POWER
6 Logan Gilbert RHP 21 FB
7 Evan White 1B 22 HIT
8 Noelvi Marte SS 16 POWER
9 Erik Swanson RHP 25 FB
10 Cal Raleigh C 21 POWER
11 Josh Stowers CF 21 HIT
12 Sam Carlson RHP 19 CH
13 Juan Querecuto SS 17 THROW
14 Dom Thompson-Williams CF 23 FIELD
15 Nick Rumbelow RHR 26 CB

Jason A. Churchill

Churchill founded Prospect Insider in 2006 after getting his start at He 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 prior to joining HERO Sports in July, 2016.

Find Jason's Mariners podcast, Baseball Things, right here and follow him on Twitter @ProspectInsider.