Ken Griffey Jr. Autographed Mariners 1989 White Mitchell & Ness Authentic Jersey (L) – BAS Witness

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Celebrate the rookie year of “The Kid” with this Ken Griffey Jr. Autographed 1989 Seattle Mariners White Mitchell & Ness Cooperstown Collection Jersey (Size L). This authentic throwback jersey pays tribute to Griffey’s debut season, when he began carving his legacy as one of baseball’s most iconic players. The autograph has been witnessed and certified by Beckett Authentication Services (BAS), guaranteeing authenticity and collector value.

Key Features

  • Hand-signed by Hall of Famer Ken Griffey Jr.
  • Official Mitchell & Ness 1989 Authentic Cooperstown Collection jersey
  • Classic white Seattle Mariners throwback design (Size L)
  • Beckett BAS Witness tamper-proof hologram and COA included
  • Perfect for collectors, framing, or display

Player Facts

  • Made his MLB debut with the Seattle Mariners in 1989 at age 19
  • 13× MLB All-Star, 1997 AL MVP, 10× Gold Glove winner, 7× Silver Slugger
  • Hit 630 career home runs, ranking 7th all-time in MLB history
  • Inducted into the Baseball Hall of Fame in 2016 with a record-setting 99.32% vote
  • Remembered as one of the greatest Mariners and most popular players in MLB history

Specifications

Player Ken Griffey Jr.
Team Seattle Mariners
Year 1989 (Rookie Season)
Brand Mitchell & Ness Cooperstown Collection
Color White
Size L
Authentication Beckett BAS Witness Certified

Authenticity & Shipping

  • Authenticity: Beckett BAS Witness tamper-proof hologram and COA included
  • Condition: Mint jersey with bold, clear autograph
  • Packaging: Securely packed to ensure safe arrival
  • Shipping: Free U.S. shipping with international delivery options available

Note: Signature placement may vary slightly from product images shown.

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