The Seattle Mariners announced their 2015 Opening Day Roster Saturday afternoon, officially purchasing the contract of left-hander Tyler Olson in the process.

A little over a year ago, the club announced its 2014 Opening Day Roster. Let’s compare.

First 2015:



And 2014 (click to enlarge):

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.