San Francisco 49ers offensive guard Ian Silberman (62) and guard Joe Looney (78) run onto the field with teammates before an NFL preseason football game against the San Diego Chargers in Santa Clara, Calif., Thursday, Sept. 3, 2015.
San Francisco 49ers offensive guard Ian Silberman (62) and guard Joe Looney (78) run onto the field with teammates before an NFL preseason football game against the San Diego Chargers in Santa Clara, Calif., Thursday, Sept. 3, 2015. Ben Margot AP
San Francisco 49ers offensive guard Ian Silberman (62) and guard Joe Looney (78) run onto the field with teammates before an NFL preseason football game against the San Diego Chargers in Santa Clara, Calif., Thursday, Sept. 3, 2015. Ben Margot AP