Chargers focused on avoiding a letdown and not a potential playoff berth in matchup with Patriots

— If Los Angeles Chargers coach Jim Harbaugh has given any thought to the possibility of clinching a playoff berth in his first season with the team with a win at New England on Saturday, he isn’t letting it show. Aside from wrapping up what would be Harbaugh’s fourth postseason trip in five years as an NFL head coach, since the Chargers have the tiebreaker over the Denver Broncos but not against the Pittsburg Steelers, Los Angeles would appear destined to be the sixth seed in the postseason. And that’s taking care of the Patriots, who have lost five straight games but showed several signs of offensive improvement during their 24-21 loss at Buffalo last week. Los Angeles has averaged only 74.8 rushing yards in the past four games, which is quite a drop from the 118.1 they were generating before Dobbins’ injury.