To be accurate it was only McCoy that was missing in the Charger game. Not McCoy isn't big piece. And JH played behind the same line that SR did in the Den game and drove them for a TD pass with no running plays.
Also the OL play in the 2nd half was like night and day last game even in the run game which basically WAS that last drive. JH had a 1st down throw wiped out by a holding on Patrick