This year, Prospect Insider decided to publish all ‘Preview Guide’ type material right here on the site, and we started doing that Monday with Chris Moran’s MLB Breakthrough Starting Pitcher Candidates. We’ll continue to add to that as the month continues. We’ll conclude that with two days of predictions, ending on Opening Day, March 31.

The Prospect Insider Handbook, scouting and ranking the Seattle Mariners’ top prospects, however, is ready for your viewing, by clicking here. Most browsers will download the PDF automatically.

As per usual, it’s in PDF form. Don’t forget to use the bookmarks to move around from player to player.

Aside from the Top 30 rankings, there are full scouting reports, tools grades, MLB ETA and MLB Comps on the Top 10, and mini scouting reports on Nos. 11-30.

Also included:
Best Tools
Organizational Depth
Projected 2017 Lineup, Rotation, Bullpen

Click here to access the 2014 Prospect Insider Handbook.

Photo of Gabriel Guerrero by (Paul R. Gierhart/MiLB)

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.
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