Jackie Robinson makes his regular season debut for the Montreal Royals of the International League

Jack Roosevelt Robinson was an American professional baseball player who was the first African American to play in Major League Baseball (MLB) in the modern era. Robinson broke the color line when he started at first base for the Brooklyn Dodgers on April 15, 1947. The Dodgers signing Robinson heralded the end of racial segregation in professional baseball, which had relegated black players to the Negro leagues since the 1880s.