Points will likely come at a premium when the Pittsburgh Steelers welcome the visiting Los Angeles Chargers to town on Sunday afternoon. Opponents have yet to figure out how to break through against either team, with Los Angeles (2-0) allowing the fewest points per game in the NFL (6.5) through the first two weeks of the season.

Pittsburgh ranks second in that category, yielding an average of 8.0 points. "Outstanding," Los Angeles coach Jim Harbaugh said of the Steelers' defense.

"One of the best front sevens in football, and elite in the coverage area as well." Cutting through Pittsburgh's secondary could be that much tougher for the Chargers if quarterback Justin Herbert isn't able to play. Herbert told reporters Friday that he sustained a high-ankle sprain in last weekend's victory over the Carolina Panthers.

Herbert is listed as questionable and said he was unsure if he will play Sunday. If he can't suit up, Easton Stick would start under center. And Pittsburgh coach Mike Tomlin is keeping a close eye on Los Angeles' injury report.

"I don't speculate and read stuff on Tuesday, it's a waste of time," Tomlin said. "Participation, or lack thereof, is what gets my attention." Tomlin is more focused on his own quarterback room.

Justin Fields was the Steelers' field general for Weeks 1 and 2, and Pittsburgh (2-0) is preparing to start him once again on Sunday as Russell Wilson continues to work through a calf issue. Wilson was a limited participant in Friday's practice and is l.