Francisco Lindor is wearing number 21 as a tribute to Roberto Clemente, the legendary Puerto Rican baseball player who wore No. 21 throughout his career. Lindor and several other players wore this number to honor Clemente's legacy, especially on Roberto Clemente Day celebrations. This honor is not just about Clemente's outstanding baseball achievements, but also his exceptional character and humanitarian efforts off the field. Lindor, who shares Puerto Rican heritage with Clemente, wears No. 21 to represent the impact Clemente had both as a player and as a person who helped others and inspired many in the baseball community and beyond.