why are the blue jays wearing 21 on their jerseys

The Toronto Blue Jays are wearing the number 21 on their jerseys as part of the annual Roberto Clemente Day celebration observed by Major League Baseball (MLB) on September 15. This tradition honors the legacy of Roberto Clemente, the Hall of Fame Puerto Rican baseball player known not only for his playing career but also his humanitarian efforts. On this day, MLB allows players, especially those of Puerto Rican heritage, Roberto Clemente Award nominees, and past recipients to wear the number 21 on their uniforms. Additionally, all players, managers, and coaches wear a patch with the number 21 to commemorate Clemente's impact on the sport and community. The Blue Jays, like many other teams, participate in this tribute by wearing number 21 on their jerseys and patches as a sign of respect and remembrance for Clemente's legacy.