William Stephen Belichick (; born April 16, 1952) is an American professional football coach who serves as the head coach of the New England Patriots of the National Football League (NFL). He exercises extensive authority over the Patriots' football operations, effectively making him the team's general manager as well. He holds numerous coaching records, including winning a record six Super Bowls as the head coach of the Patriots, and two more as defensive coordinator for the New York Giants. He is widely considered to be one of the greatest coaches in NFL history.Belichick began his coaching career in 1975 and became the defensive coordinator for New York Giants head coach Bill Parcells by 1985. Parcells and Belichick won two Super Bowls together before Belichick left to become the head coach of the Cleveland Browns in 1991. He remained in Cleveland for five seasons but was fired following the team's 1995 season. He then rejoined Parcells, first in New England, where the team lost Super Bowl XXXI, and later with the New York Jets.
After being named head coach of the Jets, Belichick resigned after only one day on the job to accept the head coaching job for the New England Patriots on January 27, 2000. Since then, he has led the Patriots to 17 AFC East division titles, 13 appearances in the AFC Championship Game, and nine Super Bowl appearances, with a record six wins. In total Belichick has won eight Super Bowl titles and finished as runner-up four times from his combined time as an assistant and head coach.
Belichick is the NFL's longest-tenured active head coach, as well as the first all-time in playoff coaching wins with 31 and third in regular season coaching wins in the NFL with 261. He is one of only three head coaches who have won six NFL titles. He was named the AP NFL Coach of the Year for the 2003, 2007, and 2010 seasons. Belichick is the only active head coach named to the National Football League 100th Anniversary All-Time Team.