The Steelers defense is preparing for an old-school matchup against the Chargers' run-heavy offense. "It's fun. It's old-school football," Pittsburgh defensive lineman Cam Heyward said this week.

There may not be a grittier game this season than the Week 3 matchup between the Los Angeles Chargers (2-0) and Pittsburgh Steelers (2-0). Entering the game, both teams clearly want to do two things: Run the football early and often and play good defense.

After two games, the Pittsburgh Steelers are atop the AFC North, with the Cleveland Browns on their heels. The Steelers have a chance to put a little separation between them in their home opener against the 2-0 L.

The Chargers are on the road to face the Steelers on Sunday, Sept. 22, at 10:00 a.m. PT. To get you prepped for the Week 3 bout, here are five key things to know about Los Angeles' opponent ahead of the matchup.