The Toronto Blue Jays players are wearing number 21 to honor Roberto Clemente on Roberto Clemente Day, which is celebrated annually across Major League Baseball. This tradition involves several Blue Jays players and personnel wearing the number 21 to pay tribute to Clemente, a Hall-of-Fame Puerto Rican baseball player known for his extraordinary character and community involvement. Clemente’s legacy is commemorated every year with the Roberto Clemente Award, given to a player embodying his values. This observance coincides with the start of National Hispanic Heritage Month, making it a significant moment for recognition and respect.
Currently, one specific Blue Jays player who wears number 21 is Trey Yesavage, a recent major league debutant, who has made franchise history. This explains the presence of the number 21 on the Blue Jays on the field beyond the commemorative day.