Why every MLB player is wearing No. 42 today

MLB celebrates Jackie Robinson

The only day MLB players can wear No. 42? Jackie Robinson Day

Philadelphia Phillies - Photo of Taijuan Walker wearing a Jackie Robinson shirt that says Breaking barriers with the number 42 on it. He is also wearing gray baseball pants and a backwards

April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research

Jackie Robinson Day 2020, All Players Wearing #42 and Patches Today – SportsLogos.Net News

MLB Network - Wearing the number 42 was a tremendous honor

Jackie Robinson Day Something That Baseball Does Right Every Year - Sports Illustrated Tampa Bay Rays Scoop News, Analysis and More

Mariano Rivera Wearing Jackie Robinson's 42 to the End - The New York Times

Minnesota Twins: Top 3 Players to wear Number 42 in Team History