Seattle Mariners Edgar Martinez Autographed White Nike Cooperstown Collection Jersey Size L Beckett BAS Witness

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Every item ships with a tamper-evident hologram and serialized Certificate of Authenticity, verifiable directly with the issuing authenticator.

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$299.99
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$299.99
Regular price
$349.99
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Add a legendary piece of Seattle Mariners history to your collection with this Edgar Martinez Autographed White Nike Cooperstown Collection Jersey (Size L). One of the greatest designated hitters in MLB history, Martinez was a seven-time All-Star, five-time Silver Slugger, and a 2019 Hall of Fame inductee.

This premium White Nike Cooperstown Collection jersey features classic Mariners styling, complete with fully stitched name and numbers. Edgar Martinez’s bold signature is prominently displayed on the back number, making this an exceptional display piece for Mariners fans and baseball collectors.

This is an officially licensed Nike Cooperstown Collection jersey (not a custom jersey), offering authentic MLB-quality fabric, stitching, and detailing. Jersey size: Large (L).

The autograph is authenticated by Beckett Authentication Services (BAS Witness). A Beckett representative personally witnessed the signing, and the jersey includes a tamper-proof BAS Witness hologram for guaranteed lifetime authenticity.

Perfect for framing, man caves, memorabilia displays, or as a gift for Mariners diehards, this signed Edgar Martinez jersey is a premium collectible honoring an all-time Seattle great.

Your order includes Free Shipping & Free Returns, professionally packaged and fully insured for safe delivery.

Product Highlights

  • Hand-signed by Mariners legend Edgar Martinez
  • Official Nike Cooperstown Collection Jersey
  • Jersey Size: L (Large)
  • Fully stitched name & numbers
  • Authenticated by Beckett BAS Witness
  • Includes tamper-proof BAS Witness hologram
  • Ideal for framing & premium display setups
  • Free Shipping & Free Returns within the USA

Specifications

Player Edgar Martinez
Team Seattle Mariners
Item Type Autographed Official Nike Jersey
Collection Cooperstown Collection
Jersey Color White
Jersey Size Large (L)
Stitching Fully stitched name & numbers
Authentication Beckett BAS Witness
Includes BAS Witness tamper-proof hologram
Condition Brand New / Never Worn
Shipping Free Shipping & Free Returns (USA)

Authenticity

This jersey is authenticated by Beckett Authentication Services (BAS Witness). Each autograph is witnessed in person by a Beckett representative to ensure permanent, verifiable authenticity.

Display & Care

  • Ideal for framing in a full-size display case
  • Store out of direct sunlight to preserve the signature
  • Handle with care prior to framing to avoid wrinkles
  • Display-only item — not intended for wear

Shipping & Returns

  • Free Shipping: Fast, insured shipping across the U.S.
  • Free Returns: 30-day money-back guarantee
  • Secure Packaging: Carefully folded, bagged & boxed for protection

Frequently Asked Questions

Is the autograph authentic?

Yes — this jersey includes an official BAS Witness hologram guaranteeing authenticity.

Is this a custom jersey?

No — this is an official Nike Cooperstown Collection jersey.

Does the jersey come framed?

No — the jersey ships unframed but fits standard full-size display frames.

Is shipping free?

Yes — all GameDay Sports Memorabilia items include Free Shipping & Free Returns within the USA.

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