William Stephen Arnsparger (December 16, 1926 – July 17, 2015) was an American college and professional football coach. He was born and raised in Paris, Kentucky, served in the United States Marine Corps during World War II, and graduated from Miami University (Ohio) in 1950. Immediately upon graduation, Arnsparger was hired as an assistant coach with the Miami football program, beginning a long career in the profession. Arnsparger is best known for serving as a defensive coordinator in the National Football League (NFL) for Miami Dolphins teams that won consecutive Super Bowls (1972 and 1973) and reached another (1982), all under head coach Don Shula. Arnsparger's defenses were an important part of the Dolphins' success, and earned two nicknames over his tenure – the "No-Name-Defense" in the 1970s and the "Killer B's" in the 1980s. Later in his career, he served as the defensive coordinator for another Super Bowl runner-up, the 1994 San Diego Chargers. Before coaching in the NFL, Arnsparger served as a defensive assistant for several college football teams. He was also the head coach of the New York Giants (1974–1976) and the Louisiana State University (LSU) Tigers (1983–1986), and served as the athletic director at the University of Florida (1986–1992).