Ken Whisenhunt, their OC, could be tapped as a replacement.

McCoy has shown he's an innovator and can get his team ready for game day. Players respect him and are willing to put in the work to succeed on the field. And he's credited with helping to turn around the fortunes of franchise quarterback Philip Rivers early in the coach's tenure. Rivers, though, has regressed of late, entering Sunday with 14 turnovers in his past six games.


Ken Whisenhunt, whom the Chargers brought back to serve as the their offensive coordinator this season, could be a candidate as a replacement for McCoy. Whisenhunt has a 48-71 record as a head coach, including an appearance in Super Bowl XLIII with the Arizona Cardinals. He was fired as the Tennessee Titans head coach after one and half seasons, finishing with a 3-20 record.
http://www.espn.com/nfl/story/_/id/1...ach-mike-mccoy