No. 42 jersey tribute began in 2007 with Griffey

Ken Griffey Jr. had Jackie Robinson Day idea

A Measure of Respect for Jackie Robinson Turns Into a Movement

FS: 1990s Griffeys, HOF Autos/Relics, Superfractors, 1/1s, Rare

Ken Griffey Jr.: Road to Cooperstown by The News Tribune - Issuu

Jackie Robinson Day - Wikipedia

They call him Junior, but Ken Griffey Jr.’s career isn’t playground stuff. Twenty-two years in the MLB earned Griffey almost every honor in the sport,

1989 Topps Baseball Ken Griffey Jr. Mariners

Put No. 42 in the game

Jackie Robinson - Wikipedia

FS: 1990s Griffeys, HOF Autos/Relics, Superfractors, 1/1s, Rare

Ken Griffey Jr. Seattle Mariners Authentic Jersey Jackie Robinson

Ken Griffey Jr. Started Wearing 42 on Jackie Robinson Day! #shorts

Griffey family dinner lessons led to enduring way to honor Jackie

Ken Griffey Jr's groundbreaking idea inspired Jackie Robinson Day