What number was retired across all of MLB in honor of Jackie Robinson?
Facts about Jackie Robinson, The Learning Key
The Jackie Robinsons of every sport - The Washington Post
April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research
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This Day In Dodgers History: Roy Campanella, Sandy Koufax And Jackie Robinson Jersey Numbers Retired
Retired number, sports award
Jackie Robinson Day 2016: How Sports World Is Honoring MLB Icon, News, Scores, Highlights, Stats, and Rumors
Remembering Jackie Robinson and The Impact He Left
Robinson, Jackie Baseball Hall of Fame
Jackie Robinson Museum Opening in New York, 75 Years After He Broke Baseball's Color Barrier
Why every MLB player is wearing No. 42 today
Jackie Robinson Facts…Barrier Breaker. MLB Star. Veteran., Jobs for Veterans
The only day MLB players can wear No. 42? Jackie Robinson Day
