American League teams were slower than in the National League to really accommodate players of color. African-American players like Willie Mays, Hank Aaron and Bob Gibson became among the most exciting players in big league ball. They shared their excitement in the National League.
Calvin Griffith, owner of the Twins, did not exactly exude a progressive image. But he was quite content opening the door wide for African-American and Cuban players. I know what you'll probably say: "Yeah, and that was because he figured they'd work cheap." Rimshot.
Inevitable forces at work
A parallel movement at present