why are players wearing 21 today

MLB players are wearing the number 21 today to honor Roberto Clemente on Roberto Clemente Day, which is celebrated around September 15 each year. Roberto Clemente was a legendary Puerto Rican Hall of Famer who wore the number 21 throughout his career and was the first Latin American player to reach 3,000 hits. The day commemorates his life, achievements, and humanitarian efforts, especially his tragic death while delivering aid to earthquake victims. Players and on-field personnel alike wear the number 21 or a patch with the number to celebrate his legacy and Hispanic Heritage Month. This event also includes various ceremonies and recognition of players who embody Clemente's spirit of community and excellence in baseball.