Green-Ellis getting onto the field is a very large boost for the Patriots because Danny Woodhead is also active but warming up under the medical staff's supervision.
This means that Green-Ellis would be getting as many snaps as possible for him. With Woodhead likely to be more limited, the Patriots will be looking to Green-Ellis as well as rookie Stevan Ridley.
Green-Ellis had a career day in a Week 5 victory over the Jets, amassing 136 yards and two touchdowns on 27 carries.
In Week 6, Green-Ellis will be looking to capitalize on his strong form and break down the Cowboys defense. This will be difficult, though, because the Cowboys have been one of the toughest against the run.
The running game just has to even out the offense and allow for Tom Brady to have some stability and time to make his passes, so Green-Ellis is more of a complementary player. Still, he holds a lot of value for this Patriots team.
He also needs to block and take the ball to vary the plays and help push back the Cowboys from playing the pass too often.
With Danny Woodhead likely limited, Green-Ellis needs to create that balance.
He will not be the fulcrum of the offense—that will still, of course, be Tom Brady—but BenJarvus Green-Ellis will be more then a crucial part.
The Patriots have shown over the years that they can function even if not all the pieces are oiled and operating to the best of their abilities. Luckily for New England, the Pats won't have to worry as much about doing that with Green-Ellis active.