Green should not start. His body isn't capable anymore at 33 to absorb full-time punishment like he did in '03.
I admit it's refreshing to see a GB back showing flashes of eliteness though. His running style is so menacing, almost lethal. The defender who has the angle on him is guaranteed a lasting reminder of the impending impact.
It may be that Grant will benefit from watching Green firsthand, how the defense reacts to a true, power RB. Is that why Green is back on the team?
Grant had a decent half-season in '07. Hard to say what sparked that but he showed he does have what it takes to dominate. He just seems to have lost the explosiveness that won him the job in the first place. Maybe it's the lack of confidence in the O-line. Everyone wants to blame Grant for not seeing the cutback lane or hesitating. If your line isn't getting it done it's not fair to blame Grant for not recognizing when or where the lane develops. Grant isn't the speed back, he's full speed after several strides, unlike a Chris Johnson who can be at full speed two steps after the hand-off.