The San Francisco 49ers are grappling with alarming offensive line performance as they head into Week 4 of the NFL season. Despite having several linemen ranked highly, tackle Colton McKivitz stands out for his struggle, with a pass block win rate of just 81.6%, ranking him 53rd among NFL tackles.

This inconsistency comes at a critical time, especially with key offensive players like Christian McCaffrey and Deebo Samuel sidelined by injuries. Quarterback Brock Purdy's ability to stay upright is vital as the team prepares for a challenging schedule ahead, starting with a matchup against the New England Patriots.