The 2020 Seattle Mariners Information Guide is a great resource for information on players (Major League & Minor League), historical notes and statistics, as well as bios on Hall of Famers Ken Griffey Jr., Edgar Martinez and Dave Niehaus.
The 2020 Media Guide features in-depth bios on the Mariners coaches, players and staff, a look at the club’s community involvement and an overview of historic people and moments in the history of the organization.