The Mariners and Tigers will wear No. 42 jerseys tonight since they were off yesterday when the rest of the league celebrated Jackie Robinson Day. MLB commemorates Jackie Robinson Day today to honor Robinson’s inspiring life, values, and accomplishments. In proudly putting Jackie’s No. 42 on all game jerseys, the League demonstrates a powerful, unified tribute to Jackie Robinson’s legacy. In recognition of Jackie Robinson Day, one Number 42 jersey from every Club will be team-signed and auctioned off on MLB.com with proceeds benefiting the Jackie Robinson Foundation.

Here is a blog post from the Negro Leagues Baseball Museum sharing Mariners broadcaster Dave Sims and the meaning of Jackie Robinson Day to him.