Ken Griffey Jr. Autographed Official MLB Baseball Seattle Mariners “Career Uniform Numbers” (Beckett BAS & MCS Hologram)
- Regular price
- $499.99
- Sale price
- $499.99
- Regular price
-
$562.49
Celebrate the remarkable career of one of baseball’s all-time greats with this Ken Griffey Jr. autographed Official MLB baseball, inscribed with his career uniform numbers: “3, 17, 42, 24 & 30.” This rare inscription highlights the different jerseys Griffey wore during his storied MLB journey, from his Seattle Mariners debut to his Hall of Fame career finish.
This baseball was hand-signed by Ken Griffey Jr. in the presence of a Mill Creek Sports representative and comes with their serialized hologram and matching Certificate of Authenticity. It is also certified authentic by Beckett Authentication Services (BAS), making it a dual-authenticated collectible of museum-level quality.
Product Highlights
- Hand-signed by Hall of Famer Ken Griffey Jr.
- Inscribed with his career uniform numbers: “3, 17, 42, 24 & 30”
- Official Rawlings MLB baseball with Commissioner’s stamp
- Dual authentication by Beckett Authentication Services (BAS) and Mill Creek Sports (MCS)
- Comes with serialized holograms and Certificates of Authenticity
- Signed in the presence of a Mill Creek Sports representative
Specifications
| Player | Ken Griffey Jr. |
|---|---|
| Team | Seattle Mariners |
| Item Type | Official MLB Baseball |
| Inscription | “3, 17, 42, 24 & 30” (Career Uniform Numbers) |
| Authentication | Beckett Authentication Services (BAS) & Mill Creek Sports (MCS) |
| Signature Ink | Blue Ballpoint Pen (may vary slightly) |
| Condition | Brand New / Mint |
| Includes | Dual holograms and COAs from Beckett & MCS |
| SKU | 196994 |
Authenticity
This baseball has been fully authenticated by both Beckett Authentication Services (BAS) and Mill Creek Sports (MCS). The autograph was witnessed in person by a Mill Creek Sports representative and includes serialized holograms and matching Certificates of Authenticity from both organizations, ensuring 100% genuine provenance.
Display & Care
- Store in a UV-protected acrylic display case to prevent fading
- Keep away from direct sunlight and high humidity
- Handle with clean hands or gloves to preserve the signature
Frequently Asked Questions
Is this Ken Griffey Jr. autograph authentic?
Yes. Each baseball is certified by both Beckett Authentication Services (BAS) and Mill Creek Sports (MCS), including matching holograms and COAs.
What does the “3, 17, 42, 24 & 30” inscription represent?
These numbers represent Ken Griffey Jr.’s career uniform numbers worn throughout his professional baseball career across different teams and milestones.
Is this an official MLB baseball?
Yes. This is an Official Rawlings Major League Baseball featuring the Commissioner’s stamp, identical to those used in MLB games.
Was this item signed in person?
Yes. The autograph was signed in the presence of a Mill Creek Sports representative and includes their serial-numbered hologram and COA for verification.

