Tom Brady and Bill Belichick spent 20 seasons together with the New England Patriots, building the most dominant dynasty in all of sports. However, Brady's stance on his partnership with Belichick was reportedly one of the main reasons for him leaving New England, according to ESPN's Mike Reiss.

Back in 2000, Belichick was part of the process of the Patriots selecting Brady in the sixth round of the NFL Draft. What Belichick didn't know was that Brady would become arguably the greatest quarterback in NFL history.

Nevertheless, Brady and Belichick became close during their time together, having their fair share of disagreements. But similar to how siblings are with each other, Brady and Belichick would always revert back to working well together.

After six Super Bowls and an impressive amount of wins, the 2019 season was a conundrum of sorts for the legendary duo. For the first time since 2010, New England failed to advance to the AFC Championship Game. Above all, Brady was visibly upset with the lack of weapons around him in the offense.

Given that, Brady was prepared to test free agency for the first time in his illustrious career. Despite the consistent success he had with the Patriots, Brady was ready for a new beginning.

Therefore, he chose to sign with the Tampa Bay Buccaneers, leaving the Patriots to find his successor. While it was a peculiar decision to join the Buccaneers, it appears that he just wanted a change of scenery.

At the same time, Brady believed that he and Belichick had done everything they could together. It's going to be tough to find another head coach and quarterback that achieve more together than they did over the past two decades.