Bill Klem is arguably the greatest and most accomplished umpire in the history of baseball. A National League umpire from 1905 to 1941, he holds many umpire records such as most regular season games (5,369), most games behind home plate (3,544), most World Series (18), and World Series games (108). He earned the nickname “The Old Arbitrator” and is credited as being one of the originators of using hand signals for his calls as well as being the first umpire to use an inside chest protector. After his retirement in 1941, Klem became chief of National League Umpires for ten years. In 1953 Tom Connolly and Bill Klem became the first umpires to be inducted into the National Baseball Hall of Fame.
-Michael Rinehart Jr.
Klem was such a loyal fan of the National League that he turned down an earlier job opportunity from the American League before NL President Henry Pulliam offered him a position in 1905.