MLB-Seattle Mariners

Seattle Mariners Autographed Sports Collectibles Including Signed Baseballs, Home Plates, Baseball Bats, Bases, Pitching Rubbers, Trading Cards and more. All items include Certificate of Authenticity (COA) from Beckett Authentication Services (BAS), JSA or PSA/DNA. Proof photo of Signing included with purchase (as shown).

Authenticated Autographed Collectibles with Proof Photos

Don't Be Fooled by The Spoof, Buy Authenticated Autographed Memorabilia with Proof!