San Francisco 49ers work out five offensive tackles as Spencer Burford is listed day-to-day with a knee injury. Le’Raven Clark, Chris Hubbard, Brandon Parker, Zachary Thomas, and Matt Waletzko audition for depth at tackle. Burford’s status could force a quick roster decision, with each veteran bringing a distinct past role and set of snaps to consider for immediate depth and potential Week 3 protection.