Mark Keller Dixon (born November 26, 1970) is a former American college and professional football player who was an offensive guard in the National Football League (NFL) for five seasons during the late 1990s and early 2000s. He played college football for the University of Virginia, and received All-American honors. He began his professional career playing in NFL Europe, then earned starting positions with the Baltimore Stallions and Montreal Alouettes of the Canadian Football League (CFL), and the Miami Dolphins of the NFL.