![Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB - masslive.com Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB - masslive.com](https://www.masslive.com/resizer/UXYhxGZyg6l9Bh7b01qLVdYur-4=/1280x0/smart/arc-anglerfish-arc2-prod-advancelocal.s3.amazonaws.com/public/MVEXC5N62JHDZOU3ARNO6JGKTI.jpg)
Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB - masslive.com
![Seiya Suzuki Game-Used Jackie Robinson Day '42' Jersey - 1 Hit - Cubs at Dodgers - 4/15/23 - Size 44 | Chicago Cubs Auctions Seiya Suzuki Game-Used Jackie Robinson Day '42' Jersey - 1 Hit - Cubs at Dodgers - 4/15/23 - Size 44 | Chicago Cubs Auctions](https://vafloc02.s3.amazonaws.com/isyn/images/f177/img-3859177-f.jpg)
Seiya Suzuki Game-Used Jackie Robinson Day '42' Jersey - 1 Hit - Cubs at Dodgers - 4/15/23 - Size 44 | Chicago Cubs Auctions
![Baltimore Orioles on Twitter: "The #Orioles will join @MLB in honoring the legacy of Jackie Robinson by wearing No. 42 jerseys both today & tomorrow. #Jackie42 https://t.co/NiwxPbxekP" / Twitter Baltimore Orioles on Twitter: "The #Orioles will join @MLB in honoring the legacy of Jackie Robinson by wearing No. 42 jerseys both today & tomorrow. #Jackie42 https://t.co/NiwxPbxekP" / Twitter](https://pbs.twimg.com/media/D4Msv3KWwAMRjxI.jpg:large)
Baltimore Orioles on Twitter: "The #Orioles will join @MLB in honoring the legacy of Jackie Robinson by wearing No. 42 jerseys both today & tomorrow. #Jackie42 https://t.co/NiwxPbxekP" / Twitter
![Cal Ripken Jr. Signed Orioles 34" x 42" Custom Framed Career Highlight Stat Jersey (JSA COA) | Pristine Auction Cal Ripken Jr. Signed Orioles 34" x 42" Custom Framed Career Highlight Stat Jersey (JSA COA) | Pristine Auction](https://images.pristineauction.com/68/685943/main_1498064193-Cal-Ripken-Jr-Signed-Orioles-34-x-42-Custom-Framed-Career-Highlight-Stat-Jersey-JSA-COA-PristineAuction.com.jpg)