Ken Griffey Jr. Signed Black Louisville Slugger C271 Swingman Baseball Bat – Seattle Mariners Beckett BAS Witness COA
Authenticated By
- Beckett (BAS)
- JSA
- Fanatics Authentic
- Schwartz Sports
- MLB Authentication
- PSA/DNA
- Lifetime Authenticity Guarantee
Every item ships with a tamper-evident hologram and serialized Certificate of Authenticity, verifiable directly with the issuing authenticator.
- Regular price
- $549.99
- Sale price
- $549.99
- Regular price
-
$599.99
Celebrate the unmistakable swing of one of baseball’s greatest icons with this Ken Griffey Jr. Autographed Black Louisville Slugger Player Model C271 Swingman Baseball Bat. Featuring Griffey’s personal C271 Swingman design and sleek black finish, this collectible was hand-signed by the Hall of Famer himself. Authenticated by Beckett Authentication Services (BAS) Witness, this bat includes a tamper-proof hologram and Certificate of Authenticity verifying that the autograph was witnessed in person. A striking centerpiece for any Mariners fan or MLB memorabilia collector.
Key Features
- Hand-signed by Ken Griffey Jr., Hall of Famer and Seattle Mariners legend
- Official Louisville Slugger C271 Swingman Player Model Baseball Bat
- Authenticated by Beckett Authentication Services (BAS) Witness with matching COA & numbered hologram
- Gloss black finish with engraved silver Swingman branding
- Perfect for framing, display racks, or bat cases
- Guaranteed 100% authentic signature verified by Beckett Witness
Player Facts
- Ken Griffey Jr.: Pro Baseball Hall of Famer (Class of 2016)
- 13× All-Star, 1997 AL MVP, 10× Gold Glove & 7× Silver Slugger winner
- 630 career home runs – ranked among MLB’s all-time greats
- Renowned for his signature “Swingman” style and effortless left-handed swing
- Seattle Mariners legend and one of the most beloved players in baseball history
Specifications
| Player | Ken Griffey Jr. |
|---|---|
| Team | Seattle Mariners |
| League | MLB |
| Brand | Louisville Slugger |
| Model | C271 Swingman Player Model |
| Color | Black with silver engraved details |
| Autograph | Hand-signed by Ken Griffey Jr. in teal paint pen |
| Authentication | Beckett Authentication Services (BAS) Witness COA & Tamper-Proof Hologram |
| Condition | Mint / Bold Signature / Display Ready |
| Display Recommendation | Wall mount, bat rack, or acrylic bat case (not included) |
Authenticity & Shipping
- Authenticity: Beckett BAS Witness certification ensures the autograph was witnessed and verified in person
- Condition: Glossy black finish with clean, bold silver signature
- Packaging: Professionally packed in a secure protective tube for safe delivery
- Shipping: Free U.S. shipping with tracking; international shipping available
Note: This autographed bat is intended for display and collection purposes only — not for gameplay use.
How to Verify This Item's Authenticity
This piece is BAS Witness Authenticated — the highest authentication tier offered by Beckett Authentication Services. A Beckett representative was physically present at the signing, observed the autograph being applied, and applied the tamper-evident hologram on-site. The witnessed designation provides the strongest possible chain-of-custody evidence in the industry, and Beckett maintains a public lookup tool so you can confirm the piece independently in under a minute.
- Locate the BAS Witness hologram applied to the item at the signing event. The serial number is printed on the hologram itself.
- Visit Beckett's verification page at beckett-authentication.com/search.
- Enter the serial number into Beckett's lookup tool.
- Confirm the match. The lookup will return the item details and confirm the Witnessed authentication — these should match the piece in your hands.
