What happened: The starting lineman will miss the start of the regular season following a late-June blood clot diagnosis in his lung. The Carolina Panthers placed him on the non-football injury list prior to training camp. The 31-year-old is taking blood thinners and responding well to treatment.

Why it matters: His extended absence creates an immediate void as the franchise attempts to repeat as NFC South champions. First-round pick Monroe Freeling is a candidate to take over the right side. Cornerback Jaycee Horn also opened camp on the NFI list after requiring stitches for a foot cut.

What to watch: The medical staff expects him back on the field at some point during the year. Free-agent signee Rasheed Walker could see early action if left tackle Ikem Ekwonu is delayed by a playoff knee injury.