No. 42 jersey tribute began in 2007 with Griffey

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Ken Griffey Jr. had Jackie Robinson Day idea

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

Seventy-Five Years Ago, Jackie Robinson Changed History When He Took the Field in a Brooklyn Dodgers Uniform - Jugs Sports

Ken Griffey Jr. had Jackie Robinson Day idea

Mitchell & Ness on X: 25 years ago today, Ken Griffey Jr. helped honor the iconic No. 42 as players suited up for the field on Jackie Robinson Day. The New Authentic

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Why every MLB player is wearing No. 42 today