EL SEGUNDO — It hasn’t been all bad. Really, it hasn’t. Amid the injuries to key offensive linemen and less-than-stellar play that has resulted in a record number of sacks of Pro Bowl quarterback Justin Herbert this season, there has been one constant, one unmovable force in a turbulent sea, someone who has been reliable week after week. Not only has left guard Zion Johnson played in each of the Chargers’ 16 games this season, he has also played every last one of their offensive snaps. He literally hasn’t taken a play off. He hasn’t needed a break, although surely he could have used one during this unpredictable season. Johnson is the only one, too. No other Charger has played every snap....
