![Why every MLB player is wearing No. 42 today](https://s.wsj.net/public/resources/images/OB-XB552_041513_H_20130415140140.jpg)
Photos of the Day: April 15 - WSJ
![Why every MLB player is wearing No. 42 today](https://townsquare.media/site/519/files/2013/04/42.jpg?w=980&q=75)
The Red Sox And All MLB Teams Celebrate Diversity On Jackie Robinson Day By Wearing #42
![Why every MLB player is wearing No. 42 today](https://kslsports.com/wp-content/uploads/2022/04/Jackie-Robinson-Day-2021.png)
Robinson's 42 In Dodger Blue For All Uniforms On April 15
![Why every MLB player is wearing No. 42 today](https://sabr.org/wp-content/uploads/2022/05/GriffeyKenJr42.jpg)
April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research
![Why every MLB player is wearing No. 42 today](https://www.blueridgenow.com/gcdn/authoring/2007/04/16/NHTN/ghows-NC-767b714e-5928-4514-bbc3-d759360dc997-e378c69a.jpeg?width=1200&disable=upscale&format=pjpg&auto=webp)
MLB celebrates Jackie Robinson
![Why every MLB player is wearing No. 42 today](https://pbs.twimg.com/media/EVpyTtxUwAI4WjS.jpg)
MLB Communications on X: On @MLB platforms today, all players will wear number 42 to observe Jackie Robinson Day. / X
![Why every MLB player is wearing No. 42 today](https://ogden_images.s3.amazonaws.com/www.nashuatelegraph.com/images/2022/04/04232307/JackieRobinson.jpeg)
All MLB players to wear No. 42 in Dodger blue on Apr. 15
![Why every MLB player is wearing No. 42 today](https://qph.cf2.quoracdn.net/main-qimg-4db09e4f30c9154e54e206676a744fc8-lq)
Do MLB players have to wear numbers on their uniforms? - Quora
![Why every MLB player is wearing No. 42 today](https://images2.minutemediacdn.com/image/upload/c_fill,w_720,ar_16:9,f_auto,q_auto,g_auto/shape/cover/sport/https-3A-2F-2Fpuckettspond-com-2Fwp-content-2Fuploads-2Fgetty-images-2F2016-2F04-2F1144454454-c6ef4daf21f8b36cf47368dfa22ef6ad.jpg)
Minnesota Twins: Top 3 Players to wear Number 42 in Team History
![Why every MLB player is wearing No. 42 today](https://nypost.com/wp-content/uploads/sites/2/2022/04/yankees-42.jpg?quality=75&strip=all&w=744)
Yankees stars reflect on the significance of Jackie Robinson
![Why every MLB player is wearing No. 42 today](https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/Jrobinson.jpg/800px-Jrobinson.jpg)
Jackie Robinson Day - Wikipedia