Staley is expected to miss six weeks with sprains to ligaments in his right knee. Staley sustained injuries to his medial-collateral and posterior-cruciate ligaments on the first play of Sunday's game against the Indianapolis Colts. The 49ers have lost their starting offensive tackles in back-to-back games. Right tackle Tony Pashos sustained a broken shoulder blade last week against the Houston Texans and is out for the season. Clements is expected to miss 6-to-8 weeks with a broken ...