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.
Blacks Represent 70 Percent Of NFL Players, Fan Base 83 Percent White Aug 30, 2016 4:30 PM Seventy percent of African-American men comprise NFL rosters despite representing only six percent of the United States' population.