Why are MLB players wearing No. 42 jerseys today?

Mo! Mariano Rivera, number 42. A living Legend whether you're a Yankees fan or notSO blessed to have see…

MLB to Celebrate Jackie Robinson Day Friday

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

MLB players write letters to Jackie Robinson

ESPN: MLB to allow Pirates, Puerto Rican players, award nominees to wear No. 21 on Roberto Clemente Day

Last player to wear No. 42 for each MLB team

Robinson's 42 in Dodger blue for all uniforms on April 15 - The San Diego Union-Tribune

TIME for Kids

Teams across MLB honor Jackie Robinson's 'eternal' impact

Cincinnati Reds on X: Let's take a look at the 2018 holiday and special event #RedsThreads! We'll start with Jackie Robinson Day on April 15 vs. STL, the 71st anniversary of Robinson