![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://static01.nyt.com/images/2010/04/17/sports/16robinson1/16robinson1-blogSpan.jpg)
What Happens to All Those No. 42 Jerseys? - The New York Times
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://media.cnn.com/api/v1/images/stellar/prod/130415212435-05-robinson-day.jpg?q=w_1280,h_720,x_0,y_0,c_fill/h_778)
Photos: MLB celebrates Jackie Robinson
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://c8.alamy.com/comp/2MK4T8N/players-wear-no-42-on-their-jerseys-in-honor-of-jackie-robinson-day-during-a-baseball-game-between-the-philadelphia-phillies-and-the-new-york-mets-monday-april-15-2019-in-philadelphia-ap-photoderik-hamilton-2MK4T8N.jpg)
Players wear No. 42 on their jerseys in honor of Jackie Robinson
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://miro.medium.com/v2/resize:fit:1400/0*BuSr35JUft6-qTYO.jpg)
Mariners Celebrate Jackie Robinson Day, by Mariners PR
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://blog.lids.com/wp-content/uploads/2018/04/MLB_ALL_HAIL_THE_KING_BETTS_1200X1200.jpg)
All Hail The King: Jackie Robinson Day 2018 - Lids
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://securea.mlb.com/assets/images/9/2/0/118543920/cuts/girffey42_1280_zhc371g7_bv7j8wum.jpg)
No. 42 jersey tribute began in 2007 with Griffey
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://smartcdn.gprod.postmedia.digital/nationalpost/wp-content/uploads/2013/04/jackie1.jpg)
Jackie Robinson Day kicks off with Red Sox, Rays sporting No. 42
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://www.columbiadailyherald.com/gcdn/authoring/2014/04/15/NDHE/ghows-TN-d36f41f0-3eba-4c58-938f-fe2380f9c0f7-3399e39d.jpeg?width=1200&disable=upscale&format=pjpg&auto=webp)
Jackie Robinson day celebrated across all of MLB
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://www.bostonherald.com/wp-content/uploads/2023/04/robinsondayrs02.jpg?w=525)
Red Sox notebook: On Jackie Robinson Day, Alex Cora wants his team
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When is MLB's Jackie Robinson Day?
![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB](https://s3.amazonaws.com/cms.ipressroom.com/173/files/20223/6258642f2cfac27233f944fb_Jackie+Robinson+collage/Jackie+Robinson+collage_mid.jpg)
42 facts about Jackie Robinson to celebrate the 75th anniversary