Do Brady and Belichick realize they can't win championship with this defense?

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Do Brady and Belichick realize they can't win championship with this defense?

The New England Patriots will face off against the St. Louis Rams in London on Sunday. They currently stand with a 4-3 record and are hoping on heading into their bye week 5-3.
While a win and a 5-3 record would certainly be a better situation than a loss and 4-4 record, many are skeptical that the team has what it takes for a Super Bowl run.
On Thursday's Felger & Mazz, the pair analyzed Tom Brady and Bill Belichick's comments regarding the team's improvement and debated whether they both realize that they can't win a championship with the current defense.