Dunkirk resident Mark Hammond was a football official 42 years, basketball official 33 years and baseball umpire 20 years. He was business manager of the Jamestown Falcons of the PONY League 1945-47 and general manager of Lockport of PONY League 1948. He then became general manager of Olean in PONY League 1950-51.
From 1947-49 he was general manager of the Tri-City Black Hawks and Syracuse Nationals of the National Basketball League.
Back to baseball, he was general business manager of the International League's Buffalo Bisons in the early 1950s and was a major league scout for the Washington Senators, Kansas City A's and St. Louis Cardinals.
In 1967 he managed the New York State Babe Ruth League Championship team from Dunkirk.