The reason Judge is wearing number 21 is to honor Roberto Clemente on Roberto Clemente Day, which is celebrated in Major League Baseball around September 15. Many MLB players, including Aaron Judge, wear the number 21 in tribute to Clemente, who was a legendary Puerto Rican baseball player known for his sportsmanship, community involvement, and positive contributions both on and off the field. This tradition is part of remembering Clemente's legacy and coincides with Hispanic Heritage Month celebrations in the U.S.
