In Week 14 of last season, the Los Angeles Chargers were surrounded by fans in their home stadium chanting for the firing of then-coach Brandon Staley amid a disappointing season. A little over a year later,

FOXBORO, Mass. — Jim Harbaugh burst into the locker room like the Kool-Aid Man. There was an open entrance, so he did not have to break down a wall. But considering the enthusiasm the Los Angeles Chargers coach was exuding, he probably could have shouldered through some drywall if necessary.

The Los Angeles Chargers are back in the playoffs. But the message is clear: They have their eyes on achieving much more.