Emil John "Dutch" Leonard (March 25 1909 - April 17 1983) was a right-handed knuckleballer in Major League Baseball who pitched with the Brooklyn Dodgers (1933-36), Washington Senators (1938-46), Philadelphia Phillies (1947-48), and Chicago Cubs (1949-53). He was born in Auburn, Illinois, home of the Trojans. It is said in Auburn at least that Dutch invented the knuckleball. After retirement Dutch spent some summer hours helping little league pitchers. A good teacher he taught sound mechanics with good results to these young athletes but not the knuckleball.
Leonard died in Springfield, Illinois at age of 74.