Instead of using defensive linemen as rushers in practice, coach Bill Belichick had much lighter players — mostly linebackers — attack the unit from all angles. They won’t replicate the size of the Giants players, such as the 6-foot-3, 255-pound Osi Umenyiora. So they focused on the speed. “We have a group of guys who have done it all week for us,” offensive line coach Dante Scarnecchia said. “They’re undersized, but we just have them going as fast as they can go, just giving us the fastest tempo they can give us. That’s been a huge help.”