According to a site specializing in baseball trivia, President William Howard Taft threw out the first ceremonial first pitch on April 13, 1910. The common use of presidents has persisted to this day, most likely now as a representation of baseball as America's national game and pastime. The ceremonial first pitch is also a part of the many amusements and festivities that take place in stadiums on Major League Baseball's Opening Day. Other common honorees include lesser politicians, actors, beauty queens, businessmen associated with the stadium or...