Could Tom Brady be entering his final days as a member of the New England Patriots?

It may seem hard to fathom, but as Tom E. Curran of NBC Sports Boston points out, the possibility is there.

The Patriots have four games remaining in the regular season, and even if New England goes on another Super Bowl run, that's only a few more games. At most, Brady has eight contests left in the 2019-20 campaign.

Then, both he and the Pats will have to assess their future.

Curran notes that the Patriots have had plenty of opportunities to give Brady a contract extension over the last several years, and they haven't done it. New England did rework its deal with Brady earlier in the year, but only so the Pats could not franchise tag him this offseason.

It doesn't help matters that Brady, who is now 42 years old, is in the midst of his worst season since 2013, as he has thrown for 3,268 yards, 18 touchdowns and six interceptions while completing 61.1 percent of his passes and posting a passer rating of 88.2 through 12 games.

Those numbers certainly aren't terrible, but for a guy who has registered passer ratings of 97 or above—including three seasons at over 100—for each of the last five years, they show obvious signs of a decline.

Of course, Brady can still put together another virtuoso playoff run, and if that surprises you, you probably haven't been watching much football lately. But there is no denying the fact that Brady is getting older, and we can't forget the fact that Bill Belichick considered trading him to clear the way for Jimmy Garoppolo back in 2017.

No one knows what the future holds for Brady and the Patriots, but there is a chance this could get ugly.