After five seasons playing in the National League with Brooklyn, the American League was formed, and many players jumped to the upstart league.  Fielder Jones was one of those players.

Joe Horlen debuted in the Majors with the Chicago White Sox in 1961, and two years later, he was one of the top Starters of the team.  Horlen would come of age in 1964, with a 1.88 ERA (second in the AL), and he led the league in WHIP (0.935) and H/9 (6.1).  Horlen kept his ERA under 2.90 in the next two seasons, and in 1967 he would win 19 Games, go to the All-Star Game, and win the ERA Title (2.06), and his second WHIP Title (0.953).  He also was fourth in MVP voting and second in Cy Young voting.

George Davis's best seasons occurred with the New York Giants, where he had nine consecutive .300 seasons (1893-1901), but with the formation of the American League, he was one of many who looked for a better payday.  He initially found it when he jumped to the Chicago White Sox, where he played the entire 1902 season batting .299 with 93 Runs Batted In.

Drafted with the number one Draft Pick in 1977, Harold Baines made his White Sox debut in 1981.  Baines would never evolve into an excellent (or even average) defensive player, but that is why he stayed in the American League, where he would be regarded as the sweetest hitting Designated Hitter.