Close friends of Bill Belichick seem to think that the Patriots coach, in his 18th season in Foxborough, is going to call it quits soon.

In a story from ESPN: The Magazine about how much longer Tom Brady might play, the longevity of Belichick also came up, and it sounds like the Patriots coach might soon be ready to put the NFL grind behind him.

According to the story, Belichick's friends believe that he'll only coach for two or three more years, which would keep him on the Patriots sideline until 2019 or 2020. Although the thought of Belichick retiring might sound crazy, the truth is, there's not a lot left for him to accomplish.

At 65, Belichick already has the most playoff wins in NFL history, the most Super Bowl wins by any coach ever and he even has a perfect regular season under his belt. The only thing left that Belichick could possibly even think about doing is becoming the NFL's all-time winningest coach. However, it would probably take at least five more seasons of coaching for Belichick to top Don Shula's all-time record of 347 wins (including the playoffs).

Through eight weeks this season, Belichick is sitting at 269 career wins, which means he'd need 78 more victories to tie Shula. With that goal probably out of reach, it seems that Belichick has decided to spend the next few years making sure the "Patriot Way" remains in place after he retires.