1991–97 Ken Griffey Jr. Game-Used & Signed Louisville Slugger Bat – MEARS A7 – JSA LOA In Progress (Greenshields Collection)

Outstanding Ken Griffey Jr. game-used and autographed Louisville Slugger professional model baseball bat dating to the 1991–1997 period of Griffey’s Hall of Fame career with the Seattle Mariners.

The bat has been professionally evaluated and authenticated by MEARS (Memorabilia Evaluation & Research Services), receiving a final grade of A7 with certification number 323835. According to the accompanying MEARS Letter of Opinion, the bat exhibits characteristics and use consistent with Griffey’s documented professional gamers from the era.

MEARS notes include:
Moderate game use
Ball marks and bat rack marks
Factory records match
Correct model specifications and labeling
Professional model Louisville Slugger C271
34 inches / 30 ounces
Black finish
Ash wood construction

The bat has been signed by Ken Griffey Jr. in silver marker across the barrel, creating excellent display contrast against the black finish.

The autograph was submitted to James Spence Authentication (JSA) during the 2026 Montreal Expo and has successfully passed authentication. The official JSA Full Letter of Authenticity (LOA) is currently being processed and will be provided to the winning bidder once received.

One of baseball’s most iconic and collectible modern-era players, Griffey was a 13-time All-Star, 10-time Gold Glove Award winner, 1997 American League MVP, and first-ballot National Baseball Hall of Fame inductee. Professionally authenticated game-used Griffey bats remain among the most sought-after modern player equipment pieces, particularly examples displaying strong visual appeal and accompanied by respected third-party authentication.

Authentication & Provenance
MEARS Letter of Opinion – Final Grade: A7
MEARS Certification Number: 323835
James Spence Authentication (JSA) – Autograph Passed Authentication 
Full Letter of Authenticity (LOA) in progress and will be shipped to winning bidder

This piece originates from the esteemed Greenshields Collection, a significant and carefully assembled lifetime baseball memorabilia collection built over decades. The collection features signed memorabilia, game-used equipment, and historic baseball collectibles, with items noted for their quality, consistency, and strong collector appeal.

Condition
The bat displays evident professional use throughout, including surface wear, ball marks, rack marks, and handling wear consistent with game use. The silver autograph remains bold, highly visible, and presents exceptionally well against the black barrel finish. Overall presentation is strong, with excellent collector appeal befitting a premium Griffey game-used example.

Details
Player: Ken Griffey Jr.
Team: Seattle Mariners
Manufacturer: Louisville Slugger
Model: C271
Length: 34"
Weight: 30 oz
Era: 1991–1997
Game Use Authentication: MEARS A7
MEARS Certification Number: 323835
Autograph Authentication: JSA Passed Authentication – Full LOA In Progress
Finish: Black
Wood: Ash
Provenance: Greenshields Collection