The youngest player in the entire history of the Major Leagues goes to Fred Chapman of Philadelphia of the American Association. He was born November 24, 1872 and appeared in his first Major League game on July 22, 1887, at the age of fourteen (exactly: 14 years 7 months 28 days).
Did you know that Sam Jones, Pete Appleton, Bobo Newsom and Bill Wight each pitched for six of the eight possible American League teams (during their era)?
Ted Gray is the only pitcher in American League history to pitch on four different American League teams (Chicago, Cleveland, New York & Baltimore) during the same season (1955).