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.
In Major League Baseball (MLB), a player in each league wins the RBI crown or RBI title each season by hitting the most runs batted in that year. The first RBI champion in the National League (NL) was Deacon White; in the league's inaugural 1876 season, White hit 60 RBIs for the Chicago White Stockings.