Ken Griffey Jr.

MLB Hall of Fame Outfielder · Baseball - MLB

Seattle Mariners

Ken Griffey Jr.

Era

1990s Peak Era

Item Type

Official baseball

Condition

Excellent

Rarity

Common signer

Overall Assessment

A highly collectible signature from a beloved baseball icon, presenting in great visual condition.

Authenticity Assessment

Likely authentic based on visual flow and signature characteristics.

Signature Style

Distinctive fluid script typically featuring large loops and his often-included uniform number 24 integration.

Signature Characteristics

Flowing cursive with a sharp upward slant and characteristic looped flourishes.

Ink & Medium

Blue ballpoint pen ink.

Item Description

Standard leather baseball housed in a clear protective cube display case with a handwritten label in front.

Estimated Value

$150 - $300

Comparison to Known Examples

Consistent with verified mid-career 1990s Seattle Mariners era exemplars.

Authentication Tips

Look for smooth natural flow, correct proportions in the loops, and consistent pressure without hesitation marks.

Certification Recommendation

PSA/DNA or JSA

Red Flags

No significant red flags observed in the visible signature form.

Provenance Notes

Collector labeling suggests organized storage, but direct signing provenance adds premium value.

Historical Context

One of the defining baseball superstars of the 1990s and a cornerstone of the Mariners franchise.

Market Trends

Stable demand following his Hall of Fame induction and enduring popularity.

Investment Potential

Stable long-term holding with steady collector demand.

Similar Autographs

Derek Jeter, Cal Ripken Jr., Tony Gwynn

Display & Preservation

Keep away from direct sunlight in a UV-protected display case to prevent leather toning and ink fading.

Interesting Facts

Ken Griffey Jr. has one of the most aesthetically pleasing and widely recognized swings and signatures in modern baseball history.

Identified on 8/23/2026
Ken Griffey Jr. | Autograph Identifier