Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Joseph "Sadie" McMahon (born September 19, 1867 - February 20, 1954), is a former professional baseball player who played pitcher in the Major Leagues from 1889-1897. McMahon would play for the Philadelphia Athletics, Baltimore Orioles, and the Brooklyn Bridegrooms. McMahon was born in Wilmington, Delaware and grew up in the Henry Clay Village area. In 1954, McMahon died and was buried in St. Joseph on the Brandywine Church Cemetery in Wilmington. He was inducted into the Delaware Sports Museum and Hall of Fame in 1979.