Jackie Robinson Day.

Jackie Robinson was an American baseball player who became the first African American to play in the MLB. Robinson broke the baseball color line when the Brooklyn Dodgers started him at first base on April 15, 1947. As the first major league team to play a black man since the 1880s, the Dodgers ended racial segregation that had relegated black players to the Negro leagues for six decades.
Robinson had an exceptional baseball career. Over ten seasons, all but the first of which he played at second base, Robinson played in six World Series and contributed to the Dodgers' 1955 World Championship. He was selected for six consecutive All-Star Games. He won the MLB Rookie of the Year Award in 1947, and won the National League Most Valuable Player Award in 1949, the first black player so honored. Robinson was inducted into the Baseball Hall of Fame in 1962. In 1997, Major League Baseball universally retired his uniform number, 42, across all major league teams; he was the first pro athlete in any sport to be so honored. Initiated for the first time on April 15, 2004, Major League Baseball has adopted a new annual tradition, "Jackie Robinson Day," on which every player on every team wears #42 in honor of him.




http://en.m.wikipedia.org/wiki/Jackie_Robinson