Monday marked Jackie Robinson Day across Major League Baseball, honoring him on the day he made his MLB debut back on April 15th, 1947. Back in 2007, future Hall of Famer Ken Griffey, Jr. made a special request to then-commissioner Bud Selig to wear the #42 on Jackie Robinson Day to help spread the honor, an action that quickly grew into every single MLB player wearing #42 every April 15th.
Junior, of course, went into the Hall in a Mariners cap after splitting his career between the Seattle Mariners and Cincinnati Reds. It was fitting that those two clubs faced off on Monday in Seattle in their series opener, the game itself set to start at 7:42 PM local time.