Former NFL coach Bill Belichick explains how Jim Harbaugh has transformed the Chargers into building a new identity around the league.

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.

The Los Angeles Chargers hired Jim Harbaugh to lift their organization, and within that expectation were two components. First, they wanted Harbaugh to raise the team’s floor. In the 11 seasons before Harbaugh arrived,