Bill Belichick: What went wrong for New England Patriots coach and what next?

Bill Belichick's time at the New England Patriots is over.

It could not have been a more abject ending for arguably the greatest NFL coach's 24-year stay with the most dominant franchise of modern times.

Belichick trudged off the field at Gillette Stadium on Sunday, only his eyes visible when wrapped up against the blizzard conditions, after a dreadful 17-3 home loss against the New York Jets - the latest lacklustre defeat in a season full of them.

With 13 defeats, it has been Belichick's worst campaign of his 29-year career as a head coach, and so he and owner Robert Kraft have mutually agreed to part ways.

Belichick - a six-time Super Bowl winner with the Patriots - will always be regarded as one of the best to stand on the sidelines.

In a sport built for parity, he managed to dominate like nobody we have seen before or will likely see again.

It was certainly not how he would have wanted - or deserved - to go out, but it summed up the abject misery of Belichick's final campaign in New England.

In dreadful weather, the Patriots lost to the Jets, a team they had beaten 15 times on the spin. The fact Belichick has won twice as many Super Bowls as his team could manage points summing up how far they have fallen.

The Jets are the team Belichick was head coach of for only one day, as he controversially used what was meant to be his introductory news conference to resign shortly before joining the Patriots in 2000.

Jets fans have had to watch on as Belichick broke new ground and plenty of records, alongside quarterback Tom Brady, with the pair combining to win three Super Bowls in their first four seasons together and going on to win six of their nine appearances in the big game across 18 years.

Throw in two victories as defensive coordinator of the New York Giants and Belichick has eight Super Bowl rings - another NFL record to go along with most wins as head coach (six) and most appearances (12).

Belichick is the head coach with the most play-off appearances (19), games (44) and wins (31) and, with 333 victories overall, is second on the all-time list behind only legendary Miami Dolphins coach Don Shula with 347.

There was always the argument of whether Brady or Belichick was the real driving force behind the Patriots' incredible winning run. In truth, is was a case of a perfect match.

Fierce competitors, both valued wins over ego-based statistics and both believed in the no-nonsense hard-working 'Patriot Way' that Belichick fostered in New England - with "do your job" his favourite quote.

At least three of their six Super Bowls owed more to a Belichick defensive masterclass than Brady's arm, especially their sixth, a 12-3 win over the Los Angeles Rams, while the quarterback led the greatest comeback in the game's history against the Atlanta Falcons in another.

Then, in 2020, Brady left to join the Tampa Bay Buccaneers and promptly won a seventh Super Bowl, while the Pats have slumped in his absence, with only one winning season in four and an overall 29-39 record, including one play-off loss.

Form on the field has collapsed and Belichick, in his other role as a de facto general manager, has not had much success drafting players good enough to keep his team at the top - especially at quarterback.

So with Belichick in charge of player recruitment and coaching, the buck stopped with him. In a business as brutal as this, even a six-time Super Bowl winner has a shelf life.

Belichick will turn 72 in April and has been coaching in the league since 1975, but there is no sense that he will retire, with Shula's record well within his sights.

There should be plenty of takers for a coaching legend who, for as bad as New England were this season, still had a more than decent defence.

There are a couple of big questions, though, such as whether his old-school, my-way-or-the-highway coaching style can still work in the modern game, especially at a new team.

Belichick would also likely want full control as general manager again after so long operating that way in New England - suddenly giving him a boss to answer to would not go down well - and whether a team would risk that after his recent draft displays could be a sticking point.

The Los Angeles Chargers and Arizona Cardinals have been mentioned but, as a family man, whether he would be willing to move across the country is up for debate. The Washington Commanders under new ownership could be a distinct possibility.

One thing is for certain, though: wherever Belichick ends up coaching next season and beyond, he has cemented his legacy as one of the greats - and one who deserved to ride off into the sunset rather than slope off in a snowstorm.