Ken Griffey Jr. Signed Seattle Mariners Jersey – Rich Sports Memorabilia (RSM) COA

Seattle Mariners jersey signed by Hall of Fame outfielder Ken Griffey Jr., one of the most celebrated and influential players of the modern baseball era.

Widely regarded as one of the greatest all-around talents in Major League Baseball history, Griffey Jr. combined elite power, defensive brilliance, and effortless athleticism throughout a remarkable Hall of Fame career. A 13-time All-Star, 10-time Gold Glove Award winner, and 1997 American League MVP, “The Kid” remains one of the hobby’s most collected and enduring superstars.

The navy Seattle Mariners jersey features Griffey’s iconic number “24” and has been boldly hand-signed in blue ink on the reverse numeral. The piece displays exceptionally well and is accompanied by a Rich Sports Memorabilia (RSM) authentication hologram affixed directly to the jersey.

Griffey memorabilia continues to see strong collector demand across all segments of the sports memorabilia market, particularly signed Mariners-era material tied to his peak playing years in Seattle. The jersey offers strong display appeal and represents one of the defining stars of the 1990s baseball era.

Authentication & Provenance
Authenticated with Rich Sports Memorabilia (RSM) hologram authentication affixed directly to the jersey.

Condition
The jersey presents in excellent overall condition with clean fabric, vibrant team graphics, and a bold, well-defined signature. Light handling and storage wear may be present. Please refer to photographs for complete condition details.

Details
Player: Ken Griffey Jr.
Team: Seattle Mariners
Item Type: Signed Jersey
Brand: MLB-Licensed Jersey
Size: XL
Authentication: Rich Sports Memorabilia (RSM) Hologram Authentication