Ken Griffey Jr. Signed 1997 Seattle Mariners Alternative Hat – Upper Deck UDA COA /240

Add one of baseball’s most recognizable signatures to your collection with this Ken Griffey Jr. autographed Seattle Mariners cap, authenticated by Upper Deck Authenticated (UDA).

The navy-and-gray New Era cap features the classic Mariners compass logo embroidered on the crown and is signed by Griffey across the brim in blue ink. The signature includes a “HOF 16” inscription, recognizing his 2016 induction into the Baseball Hall of Fame.

According to the original Upper Deck Certificate of Authenticity, this is an exact replica of the “1997 Alternative” cap worn by the Seattle Mariners. Griffey’s signature was witnessed and authenticated by a representative of Upper Deck Authenticated as part of the company’s authentication process. The certificate identifies the piece as #14936 – Ken Griffey Jr. Autographed “1997 Alternative” Baseball Cap and confirms that it was produced as a limited edition of just 240.

The cap retains its original New Era Authentic Diamond Collection hangtag and includes an Upper Deck Authenticated hologram with authentication number BAE11598. The original Upper Deck Certificate of Authenticity is also included, adding important provenance to an already impressive Griffey collectible.

A standout display piece for Seattle Mariners fans, baseball autograph collectors, or anyone building a collection around one of the most celebrated players of his generation.

The cap shown is the exact item you will receive.
No stock photos. No surprises.

Item Details

Athlete: Ken Griffey Jr.
Team: Seattle Mariners
Item: Autographed baseball cap
UDA Item: #14936 – “1997 Alternative” Baseball Cap
Brand: New Era
Collection: Authentic Diamond Collection
Cap Colors: Navy and gray
Signature Color: Blue
Inscription: HOF 16
Authentication: Upper Deck Authenticated (UDA)
UDA Authentication Number: BAE11598
Certificate: Original Upper Deck Certificate of Authenticity included
Limited Edition: One of 240
League: MLB
Condition: Pre-owned collectible; final condition details will be confirmed after the item is received and inspected

Why It Belongs in Your Collection

• Signed by Baseball Hall of Famer Ken Griffey Jr.
• Authenticated by Upper Deck Authenticated
• Signature witnessed and authenticated by an Upper Deck representative
• Includes the original Upper Deck Certificate of Authenticity
• Limited edition of only 240
• Exact replica of the Seattle Mariners’ 1997 Alternative cap
• Classic Seattle Mariners compass-logo design
• Blue signature displayed prominently across the brim
• “HOF 16” inscription
• New Era Authentic Diamond Collection cap
• Original retail hangtag remains attached
• Strong display piece with excellent Mariners and Griffey appeal
• Exact cap shown is the cap you will receive

Shipping & Handling

• Securely supported and packaged to help preserve the cap’s shape
• Signature, brim, tags, authentication hologram, and COA will remain protected during transit
• Packed in a sturdy shipping box
• Packed with the same care we would expect for our own collection 🤠

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