The Los Angeles Chargers' 0-4 start has placed significant pressure on Justin Herbert, who has thrown just four passing touchdowns against six interceptions through four games while completing 59.7 percent of his passes for 816 yards. The team ranks near the bottom in offensive efficiency amid adaptation to new coordinator Mike McDaniel's complex scheme, prompting public criticism from coach Jim Harbaugh on Herbert's decision-making. Key injuries compound the issues, with left tackle Rashawn Slater sidelined 4-6 weeks by a high ankle sprain and right tackle Joe Alt also potentially missing time. Herbert's upcoming matchup against the Broncos and the remaining schedule will influence whether the seven-year veteran can elevate his touchdown production in a struggling offense facing mounting trade speculation.