![Why every MLB player is wearing No. 42 today](https://img.mlbstatic.com/mlb-images/image/private/ar_16:9,g_auto,q_auto:good,w_1024,c_fill,f_jpg,dpr_3.0/mlb/sruyixcmjqgregganhir)
Last player to wear No. 42 for each MLB team
![Why every MLB player is wearing No. 42 today](https://static01.nyt.com/images/2013/03/14/sports/jpMARIANO3/jpMARIANO3-articleLarge.jpg?quality=75&auto=webp&disable=upscale)
Mariano Rivera Wearing Jackie Robinson's 42 to the End - The New York Times
![Why every MLB player is wearing No. 42 today](https://s3.amazonaws.com/cms.ipressroom.com/173/files/20223/6258642f2cfac27233f944fb_Jackie+Robinson+collage/Jackie+Robinson+collage_hero.jpg)
42 facts about Jackie Robinson to celebrate the 75th anniversary of his breaking the color barrier
![Why every MLB player is wearing No. 42 today](https://www.newsnationnow.com/wp-content/uploads/sites/108/2022/04/GettyImages-515303324.jpg?w=2536)
The only day MLB players can wear No. 42? Jackie Robinson Day
![Why every MLB player is wearing No. 42 today](https://d.newsweek.com/en/full/1778532/jackie-robinson.jpg)
Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB
![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://img.bleacherreport.net/img/images/photos/001/860/536/hi-res-150743337_crop_exact.jpg?w=3072&h=2048&q=75)
The Greatest MLB Players of All Time to Wear Each Number from 1 to 50, News, Scores, Highlights, Stats, and Rumors
![Why every MLB player is wearing No. 42 today](https://www.uticaod.com/gcdn/-mm-/607cf9e5b9ef865560771ce0856dae0de54e7c0a/c=0-284-5398-3320/local/-/media/2020/08/28/Utica/ghows-NY-200829633-29b41229.jpg?width=3200&height=1800&fit=crop&format=pjpg&auto=webp)
MLB celebrates timely Jackie Robinson Day
![Why every MLB player is wearing No. 42 today](https://img.mlbstatic.com/mlb-images/image/private/ar_16:9,g_auto,q_auto:good,w_1024,c_fill,f_jpg,dpr_3.0/mlb/uzfitkd9turx4ohiriez)
Last player to wear No. 42 for each MLB team