Through the first four weeks of the season, Tom Brady and the Patriots' offense was mediocre. In fact, you could probably say it was worse than mediocre. According to our metrics, after the Patriots faced the Chiefs in Week 4, the team's Adjusted (for strength of schedule) Net Expected Points (NEP) total was third-worst in the league, while the passing offense ranked 27th.

Now, Brady can't be stopped.

At that point in time, Brady's Passing NEP was -12.15. After Sunday's game against the Bears, Brady will have roughly a 70 Passing NEP score, an increase of over 80 points. In other words, in each game he's played since the Patriots were embarrassed by the Chiefs on national television, Tom Brady has performed about 20 points above expectation.

A healthy Rob Gronkowski certainly helps, as does stronger offensive line and receiver play. This offense is all of a sudden rolling, and it's certainly proving the early-numbers wrong.