Miami held San Diego without a touchdown over the final three quarters, and Brent Grimes broke up Philip Rivers' final pass in the end zone as time expired, giving the embattled Dolphins a 20-16 win Sunday.
The victory gave the Dolphins something to celebrate amid a harassment scandal that has raised questions about the team's locker room culture. An NFL special investigator will question players this week about what might have happened between Jonathan Martin and Richie Incognito.
Ryan Tannehill threw for 268 yards, including a 39-yard score to Charles Clay, who broke two tackles on the play. Miami managed 104 yards rushing behind a makeshift line.
The Dolphins (5-5) won for only the second time in the past seven games. The Chargers (4-6) lost their third game in a row to further hurt their chances of an AFC wild-card berth.