Robinson protested against the major leagues' ongoing lack of minority managers and central office personnel, and he turned down an invitation to appear in an old-timers' game at Yankee Stadium in 1969. He made his final public appearance on October 15, 1972, throwing the ceremonial first pitch before Game 2 of the World Series at Riverfront Stadium in Cincinnati. He gratefully accepted a plaque honoring the twenty-fifth anniversary of his MLB debut, but also commented, "I'm going to be tremendously more pleased and more proud when I look at that third base coaching line one day and see a black face managing in baseball." This wish was only fulfilled after Robinson's death: following the 1974 season, the Cleveland Indians gave their managerial post to Frank Robinson (no relation to Jackie), a Hall of Fame-bound player who would go on to manage three other teams. Despite the success of these two Robinsons and other black players, the number of African-American players in Major League Baseball has declined since the 1970s.