Mookie Betts is wearing number 21 as part of Major League Baseball's celebration of Roberto Clemente Day, which occurs every September 15. Betts is a nominee for the Roberto Clemente Award, an honor given to players for their philanthropic work and character. MLB allows nominees, previous recipients of the award, and Puerto Rican players (in honor of Clemente's heritage) to wear the number 21 jersey on this day. This tradition is meant to honor Hall of Famer Roberto Clemente, who famously wore number 21. Betts wore the 21 jersey during recent games as part of this tribute and will be officially honored for the award during a ceremony at Dodger Stadium. Other players, including Dodgers teammates, have also worn number 21 in recognition of Roberto Clemente Day and the award.
