No. 42 jersey tribute began in 2007 with Griffey

Ken Griffey Jr Checklist - Supercollector Catalog

Put No. 42 in the game

On the alluring promise of an unopened pack – SABR's Baseball Cards Research Committee

Ken Griffey Jr. had Jackie Robinson Day idea

42” watered down: LaTroy – The Denver Post

Mariners retire Ken Griffey Jr.'s No. 24

Top 100 MLB players of all time - Nos. 25-1 - ESPN

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Dragons Welcome Two Former MLB All-Stars as Part of 2022 Coaching Staff

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A Measure of Respect for Jackie Robinson Turns Into a Movement - The New York Times

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