As crazy as it sounds, Tom Brady appears to be peaking at age 39.

Back in 2007, Brady set the NFL record for touchdown passes in a season with 50. If he played a full 16-game season at the rate he's performed through his four games in 2016, he'd come just short of that mark with 48.

This is, perhaps, the best we've seen Brady play since his age-30 season. That's insane.

Focus on training

While discussing his continued success with Mike Reiss of ESPN, Brady was candid about the formula that's allowed him to perform at such a high level:

Brady: You know how I'm doing it; you've talked a lot about my training over the years [smiling].

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Brady went into more depth:

When I sat back and watched those four weeks, you could see how great our coaches are, and how hard our team works. I just wanted to do the best I can to stay in shape, do what I've always done, and try to replicate all the things I do at practice. Then when I came back, it's just kind of getting back into the routine. I'm just happy that our team is at the place we're at. It doesn't mean anything because we're only eight games in. We have a long way to go. I look forward to the second half of the season; we're going to have a tough test coming right off the bat against Seattle on Sunday night, but that will be a good test to see where we're at. We know how good of a team they are.

As Brady noted, his training regime has been well-documented. He credits trainer Alex Guerrero's tense and strict methods for his longevity. Yet, other great athletes have bottomed out at this point in their careers despite taking extremely good care of themselves.

Brady is simply a different animal, and he won't be stopped any time soon.