Justin Herbert enters Week 5 of the 2026 NFL season with just four passing touchdowns and six interceptions through four games for the 0-4 Los Angeles Chargers. The seventh-year quarterback is posting career-low efficiency marks under new offensive coordinator Mike McDaniel, including a 59.7% completion rate and 70.6 passer rating. Multiple offensive line injuries have compounded the issues, with Pro Bowl left tackle Rashawn Slater placed on injured reserve after ankle surgery, right tackle Joe Alt sidelined by a neck injury, and several rookies filling starting roles. These factors have limited Herbert’s protection and downfield opportunities while the Chargers rank near the bottom of the league in scoring and offensive efficiency. The upcoming schedule features tough road tests against Kansas City and Baltimore, though continued adjustment to the new scheme and potential line stabilization could influence volume and scoring output over the remaining 13 games.