Atopy is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.
As of 2012, 63.9 percent of players playing in Major League Baseball are white. There is no way of telling the exact number due to the number of players.
Fowler played 11 consecutive seasons with white baseball teams, which at the time was the most by a black player. It was a record that lasted until Jackie Robinson broke it with his 12th season with the Dodgers in 1956.