"Rob's always worked hard," Belichick said. "He worked hard as a rookie. ... When he's here ... what we've seen is he's been consistent."
Gronkowski's knee rehab went a lot smoother than previous surgeries. Barring a setback, he should be close to 100 percent when the season opens at Miami.
After struggling mightily early last season with Gronkowski on the PUP list, Brady rebounded to average an NFL-high 35.75 points and 473.25 yards per game over a five-game stretch once Gronk got into game shape.