John Sullivan is a former professional American football center who played in the National Football League (NFL). He was born on August 18, 1985, in New York, and attended University of Notre Dame, where he played college football. Sullivan was selected by the Minnesota Vikings in the sixth round of the 2008 NFL Draft. During his career, Sullivan played for the Vikings and later for the Los Angeles Rams. He was known for his strong blocking skills and leadership on the field. Over his career, he contributed to his teams' offensive lines, helping to protect quarterbacks and create running lanes for running backs.