San Francisco 49ers star left tackle Trent Williams is holding out of training camp as he seeks a new contract, placing significant strain on the team's offensive line. Williams, who has three years remaining on his six-year contract signed in 2021, is currently listed on the Reserve/Did Not Report List, incurring fines of $50,000 per day. The 36-year-old All-Pro player is seeking better guarantees and a salary adjustment to reflect his status as one of the league's top offensive linemen. Offensive line coach Chris Foerster emphasized the importance of Williams' practice reps, despite his veteran status. In Williams' absence, backup Jaylon Moore is taking first-team reps, but the holdout remains a significant concern for the 49ers. This situation adds to the team's contract challenges, as wide receiver Brandon Aiyuk is also holding in due to his contract issues.