The Toronto Blue Jays, along with all other MLB teams, are wearing the number 21 today to honor Roberto Clemente Day. This is a league-wide recognition where all players, managers, coaches, and umpires wear a white "21" patch on their uniforms. Some players of Puerto Rican heritage, past Roberto Clemente Award recipients, and nominees have the option to wear the number 21 during games on this day. Roberto Clemente was a Hall of Famer, a 15-time All-Star, and a humanitarian who recorded exactly 3,000 career hits and died in 1972 delivering earthquake relief supplies. His number 21 was retired by the Pittsburgh Pirates, and MLB celebrates his legacy annually by having this tribute on Roberto Clemente Day. Since the Blue Jays are playing on this day, they are participating in this tribute by wearing the number 21.