Chargers head coach Jim Harbaugh said that Justin Herbert knocked him from the top spot as the toughest QB in NFL history, adding that no QB has been better than Herbert this season in an interview on "The Herd.

Former Oregon Duck and current Los Angeles Chargers starting quarterback Justin Herbert is leading the NFL with only one interception in eight starts. His one turnover through the air is the least of all NFL quarterbacks starting every game.

After being 2-2 at the bye week, the Chargers have won three of four — including two straight by at least 17 points — and are playing their best football of the season. The biggest reason for the Chargers' turnaround has been something that Harbaugh has preached from when he was hired as head coach on Jan. 24 — mental toughness.

Los Angeles Chargers head coach Jim Harbaugh has never been known to be a guy who would ever shy away from showing rabid enthusiasm or excitement. Harbaugh's seemingly endless energy is widely known by now and it's never been limited to just college football or in the NFL, whether as a player or coach.

When the Chargers have a performance like this, it can be pinpointed by the performance of quarterback Justin Herbert. Herbert delivered a masterful game in the Chargers' victory, throwing for 282 yards and two touchdown passes.

Los Angeles Chargers quarterback Justin Herbert achieved a perfect passer rating in their recent win, joining the ranks of NFL elites like Joe Burrow and Tom Brady. This accomplishment adds to Herbert's impressive season,