John James Rigas (November 14, 1924 – September 30, 2021) was an American businessman who was one of the founders of Adelphia Communications Corporation, which at its peak was one of the largest cable TV companies in the United States. He was also the majority owner of the Buffalo Sabres franchise of the National Hockey League. In 2005, he was convicted on multiple charges of fraud and sentenced to 15 years in prison, serving nine of those years before being released due to declining health.