Stefano "The Undertaker" Magaddino was an Italian-born crime boss of the Buffalo crime family in western New York. His underworld influence stretched from Ohio to Southern Ontario and as far east as Montreal, Quebec. Known as Don Stefano to his friends and The Undertaker to others, he was also a charter member of the American Mafia's ruling council, The Commission.

The Buffalo crime family, also known as the Magaddino crime family, Buffalo Mafia, The Arm, the New York State crime family, the Upstate New York Mafia, and the Todaro crime family, is an Italian-American Mafia crime family based in Buffalo, New York. Criminal investigators assert that the family operates throughout Western New York, Erie, Pennsylvania, and Hamilton, Ontario, Canada. The Buffalo family is purported to hold strong connections with the Hamilton-based Luppino and Papalia families. According to the U.S. Department of Justice, the current boss of the Buffalo crime family is Joseph A. "Big Joe" Todaro Jr., having assumed the role after his father, Joseph E. "Lead Pipe Joe" Todaro Sr., retired.