Why are MLB players wearing No. 42 jerseys today?

Now honoring No. 42: Jackie Robinson Day in majors - The San Diego Union-Tribune

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

The Greatest MLB Players of All Time to Wear Each Number from 1 to 50, News, Scores, Highlights, Stats, and Rumors

Do MLB players have to wear numbers on their uniforms? - Quora

Five Astros wear No. 21 on Roberto Clemente Day

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

MLB celebrates Jackie Robinson, calls for justice continue

Why are Boston Red Sox players all wearing No. 42 jerseys? Jackie Robinson day across the MLB

Why the Red Sox are wearing their yellow uniforms

Was Roberto Clemente the Best MLB Player to Wear No. 21?