Seattle Mariners Baseballs

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Autographed Seattle Mariners Baseballs

A signed baseball is the cornerstone of any Mariners collection. Pristine Marketplace carries over 570 authenticated Seattle Mariners baseballs autographed by legends and current stars alike. Find signed balls from Ken Griffey Jr., Ichiro Suzuki, Edgar Martinez, Felix Hernandez, and many more — each verified by our six authentication partners and Pristine Authentic, our in-house authentication arm. Every baseball ships with a COA and tamper-evident hologram.

Continue building your Mariners collection with autographed bats, signed photos, or explore the full Seattle Mariners memorabilia hub. All purchases include our 60-day return policy.

What makes a signed Mariners baseball valuable?

Value depends on the player, the ball type (official MLB vs. replica), inscription details, and authentication. Baseballs signed by Hall of Famers like Griffey Jr. or Ichiro are especially sought after by collectors.

How are Mariners autographed baseballs authenticated?

Every baseball is verified through one or more of our six trusted authentication partners or Pristine Authentic. Each includes a Certificate of Authenticity and tamper-evident hologram that cannot be transferred to another item.

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