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.
I am honored to have John Lloyd called the Black Wagner. Negro League players are often portrayed as victims of baseball's color line, which, predating the establishment of Major League Baseball, began in 1867 and fell apart gradually from 1947 to 1959.