![Last player to wear No. 42 for each MLB team](https://securea.mlb.com/assets/images/7/4/0/118580740/cuts/jrd1280_ofu0xy33_ikxxjyus.jpg)
Teams across MLB honor Jackie Robinson's 'eternal' impact
![Last player to wear No. 42 for each MLB team](https://img.mlbstatic.com/mlb-images/image/private/t_16x9/t_w1024/mlb/wcxv14oggsna3neeofck)
Every MLB team's retired numbers
![Last player to wear No. 42 for each MLB team](https://images2.minutemediacdn.com/image/upload/c_fill,w_1440,ar_16:9,f_auto,q_auto,g_auto/shape/cover/sport/4aa7d86d9087c833447a4ca2f50606d255206b57157aaffc810f910a3b582730.jpg)
Why are MLB players wearing No. 42 jerseys today?
![Last player to wear No. 42 for each MLB team](https://img.mlbstatic.com/mlb-images/image/upload/t_4x1/t_w2208/mlb/jfzchdstawqdknztxzks.png)
Jackie Robinson Day, MLB Together
![Last player to wear No. 42 for each MLB team](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
![Last player to wear No. 42 for each MLB team](https://www.desertsun.com/gcdn/presto/2020/03/12/USAT/0480db37-b27f-47d0-9550-77814d1e46f6-Opening_Day_logo.jpg?width=1280&height=720&fit=crop&format=pjpg&auto=webp)
From Jackie Robinson to Ronnie Lott and Mariano Rivera, wearing No. 42 carried special meaning
![Last player to wear No. 42 for each MLB team](https://dodgerblue-com.exactdn.com/wp-content/uploads/2021/04/jackie-robinson-day-pitchers-mound.jpg?strip=all&lossy=1&ssl=1)
All MLB Teams Wearing No. 42 In Dodger Blue On Jackie Robinson Day
![Last player to wear No. 42 for each MLB team](https://www.eastbaytimes.com/wp-content/uploads/2017/04/cardinalsyankeesbaseball.jpg?w=620)
Photos: MLB celebrates 70th anniversary of Jackie Robinson's breaking of color barrier – East Bay Times
![Last player to wear No. 42 for each MLB team](https://upload.wikimedia.org/wikipedia/commons/2/2d/Jackie_Robinson%2C_Brooklyn_Dodgers%2C_1954.jpg)
Jackie Robinson - Wikipedia
![Last player to wear No. 42 for each MLB team](https://cdnph.upi.com/pv/upi/b93eb8de8c34e7c53004bd712d2f3a3c/PITTSBURGH-PIRATES-ST-LOUIS-CARDINALS.jpg)
Photo: Players Wear Number 42 On Jackie Robinson Day - SLP2023041502