In baseball, the number 21 is famously associated with Roberto Clemente, a legendary Puerto Rican player known not only for his outstanding talent but also for his humanitarian efforts. MLB players, managers, and coaches wear the number 21 or a patch with the number on September 15th to honor Clemente's legacy. This date marks Roberto Clemente Day, coinciding with the start of National Hispanic Heritage Month. Clemente was a trailblazer as the first Latino player to win a World Series, the first Latino inducted into the Baseball Hall of Fame, and was renowned for his selfless charity, ultimately dying in a plane crash while delivering aid to earthquake victims in Nicaragua. Wearing number 21 in baseball is thus more than just a number; it is a tribute to Clemente's impact on and off the field, celebrating his spirit, achievements, and his efforts to help communities. The number is also worn by Puerto Rican players and recipients or nominees of the Roberto Clemente Award, which honors players for their philanthropic contributions.