After graduating, Belichick took a $ 25-per-week job as an assistant to Baltimore Colts head coach Ted Marchibroda in 1975.

Under Belichick, the team won three Super Bowls in four years, and finished the 2007 regular season with a perfect 16 – 0 record, becoming only the fourth team in league history to go undefeated in the regular season, and the only one since the league expanded its regular season schedule to 16 games.

The other four are Tom Landry, Don Shula, Tony Dungy, and Bill Belichick, all Super Bowl winners.

Both Coughlin and Belichick have gone on to win Super Bowls as head coaches: Belichick with the Patriots in Super Bowls XXXVI, XXXVIII, and XXXIX ; Coughlin with the Giants in Super Bowl XLII and Super Bowl XLVI, coincidentally, both against Belichick's Patriots.

He and Bill Belichick have also combined to form one of the most successful quarterback-coach tandems in NFL history, winning 125 regular season games and 16 postseason games together, as well as appearing in five Super Bowls together, all NFL records.

Since then, Belichick has coached the Patriots to five Super Bowl appearances: victories in Super Bowls XXXVI, XXXVIII, and XXXIX, and subsequent losses in Super Bowl XLII and Super Bowl XLVI.

Soon after Super Bowl XXXI, Belichick ( and most of the Patriots assistant coaches ) migrated with Parcells to the New York Jets.

This sent New England to their fifth Super Bowl under Belichick.

He served as offensive coordinator under head coach Bill Belichick from 2000 through 2004, installing the Erhardt-Perkins offensive system, and assisting the Patriots in three Super Bowl victories ( XXXVI, XXXVIII, XXXIX ).

After the Super Bowl, Mitchell continued to sound off in interviews in which he criticized the Patriots, as well as Belichick, saying that the way the Patriots reacted reminded him of " little girls.

Crennel was hired as the Cleveland Browns ' defensive coordinator for the 2000 season, before filling the same role with the Patriots for four seasons ( 2001 – 2004 ) under long-time friend ( Bill Belichick ); helping lead New England to 3 Super Bowl victories: ( 2001, 2003, & 2004 ).

In recent years Bill Belichick, head coach of the three time Super Bowl champion New England Patriots and former coach with the Detroit Lions in the 1970s, has commented on Stufflebeem ’ s leadership prowess.

In a press conference the week before Super Bowl XLII in February 2008, Patriots head coach Bill Belichick praised Warren's work ethic, attitude, and leadership.

In 2007, Bill Belichick led the Patriots to the first perfect regular season since the introduction of the 16-game regular season schedule in 1978, only the fourth team to do so in National Football League history after the 1934 and 1942 Chicago Bears and 1972 Miami Dolphins.

Following a game in which the Patriots defeated the Redskins 52-7, Godfrey accused Belichick of showing the Redskins " no respect " because the Patriots continued to call deep passing plays despite leading 38-0 entering the fourth quarter.

Under quarterback Tom Brady and head coach Bill Belichick, the Patriots have also compiled the longest winning streak consisting of regular season and playoff games in NFL history, a 21-game streak from October 2003 – October 2004.

The Giants ' triumph helped Belichick and wide receivers coach Tom Coughlin make their names and eventually land head-coaching jobs with the Cleveland Browns and Boston College, respectively.

Notable celebrities have included fan favorite Bill Murray, Glenn Frey, Kevin Costner, Steve Young, George Lopez, Tom Brady, Bill Belichick and Carson Daly.

All of the teams are or were coached by a first or second generation member of the Bill Parcells Coaching Tree: the Patriots have Bill Belichick ; the Dolphins had Tony Sparano ; the Jets had Eric Mangini ( who served as an assistant with both Belichick and Parcells ); and the Bills had Dick Jauron ( fired on November 17, 2009 ), who served as an assistant with former Parcells assistant Tom Coughlin.

However, Brady played much of the second half of the season with a shoulder injury, and New England head coach Bill Belichick has since indicated that if the Patriots had made the playoffs, Brady would not have been able to play in the first game due to that injury.

The win, his first postseason win since January 2008, gave Brady and Patriots head coach Bill Belichick sole possession of the NFL record for postseason wins by a QB-coach combo with 15.

This game also marked three career playoff records: Brady and Patriots head coach Bill Belichick set records for 10 straight postseason victories, eclipsing Vince Lombardi's run with the Green Bay Packers in the 1960s.

* On September 16, 2007, Owens mocked Bill Belichick after catching a touchdown against the Miami Dolphins, by hiding behind a field goal post and holding the football to his face in a video camera fashion, as if secretly spying and filming the game.

Belichick has also used his linebackers, including Bryan Cox and Mike Vrabel, as H-backs on offense, and doubled his wide receivers ( e. g. Troy Brown and Randy Moss ) as cornerbacks and safeties.

Vrabel exemplified the versatility sought by Patriots head coach Bill Belichick: in addition to his work as a linebacker, Vrabel frequently checked in as a tight end in short-yardage situations, which made him an eligible receiver.

Soon after hiring Belichick, owner Robert Kraft gave him considerable authority over the team's football operations, effectively making him both general manager and head coach.

He has the final say in football matters, thus making him one of three coaches who also has the title or powers of general manager ( along with New England Patriots's Bill Belichick and Philadelphia's Andy Reid ).

The Patriots, coached by Bill Belichick, lost their first two games.

Coaching continuously in various roles in the NFL since 1975, Belichick earned his first head coaching job with the Cleveland Browns in 1991.

After first being given assurances that he would coach the transplanted Baltimore Ravens, Belichick instead was fired on February 15, 1996 — one week after the shift was officially announced.

Patriots head coach Bill Belichick and his scouts were so impressed by Warren's college performance that they made a trade in order to get him at No. 13 in the first round of the 2003 NFL Draft.

During his first stint in Cleveland, he worked with several talented young scouts and assistant coaches that Belichick had assembled, including Nick Saban, Kirk Ferentz, Pat Hill, and Jim Bates.

He was selected by the Cleveland Browns under then head coach Bill Belichick in the first round ( 9th overall ) of the 1992 NFL Draft.

The defensive game plan for the Giants, written by defensive coordinator Bill Belichick, has been included in the Pro Football Hall of Fame.

In the off season, Parcells hired his old Giants defensive co-ordinator Bill Belichick in January 1996 as Assistant Head Coach and receivers position coach.

Then Patriot defensive coordinator ( and now head coach ) Bill Belichick is quoted as saying Parcells ' plans to leave for the Jets were a distraction, " Yeah, I'd say it was a little bit of a distraction all the way around.

In 1979, Belichick began his 12-year stint with the New York Giants alongside head coach Ray Perkins as a defensive assistant and special teams coach.

After his dismissal by the new Baltimore Ravens, Belichick served under Parcells again as assistant head coach and defensive backs coach with the Patriots for the 1996 season.

Belichick served as assistant head coach and defensive coordinator for the Jets from 1997 to 1999.

George Young picked Handley to serve as head coach of the Giants after then-Giants defensive coordinator Bill Belichick left to coach the Cleveland Browns.

The bad relationship between Young and Belichick also played into Handley's promotion ; Young had consistently given a negative review about Belichick when teams with potential coaching opportunities inquired about him, and never felt his defensive coordinator had the leadership abilities to run his own team.