![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://securea.mlb.com/assets/images/1/8/8/118626188/cuts/sea1280_yt37d4ey_0991wqxq.jpg)
Mariners at forefront of establishing Jackie Robinson Day
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://www.denverpost.com/wp-content/uploads/2022/04/TDP-L-ROCKIES-CUBS_JAC0880x.jpg?w=1024&h=903)
Charlie Blackmon, Rockies appreciate 75th anniversary of Jackie
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://pittsburghbaseballnow.com/wp-content/uploads/sites/27/2023/09/Clemente--scaled.jpg)
Demilio: Roberto Clemente Day Serves as Another Reminder to Retire
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://cdn.britannica.com/85/3785-050-2C088165/Jackie-Robinson-1946.jpg)
Jackie Robinson Biography, Statistics, Number, Facts, & Legacy
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://cdn.vox-cdn.com/uploads/chorus_image/image/67310619/3203656.jpg.0.jpg)
MLB is having its annual Jackie Robinson Day amid historic protests
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://www.washingtonpost.com/wp-apps/imrs.php?src=https://arc-anglerfish-washpost-prod-washpost.s3.amazonaws.com/public/6QX4ZNV45YI6ZKJNY5R55AMMEE.jpg&w=1200)
After Jackie Robinson, MLB integration was halting - The
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://cdn.uni-watch.com/app/uploads/2018/04/Da2I9PkVwAAAza4.jpg)
Jackie Robinson Day Recap
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://www.ocregister.com/wp-content/uploads/2020/08/Mariners-Angels-Baseball-1.jpg?w=525)
Angels and Mariners lock arms in show of support on Jackie
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://thumbs.6sqft.com/wp-content/uploads/2018/12/21121447/Robinson-at-Bat.png)
Finding 42: Swing through these 10 NYC sites associated with
![Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB](https://ewscripps.brightspotcdn.com/dims4/default/4f0aee9/2147483647/strip/true/crop/1000x525+0+19/resize/1200x630!/quality/90/?url=https%3A%2F%2Fewscripps.brightspotcdn.com%2F26%2F7f%2F002f5a074ee788763bd7c7e9a7f0%2Fap21105449974625.jpg)
Why every MLB player is wearing No. 42 today