Campbell will undergo an MRI on the knee he injured during the Titans' 30-27 preseason win over the Saints on Sunday, Jim Wyatt of the Titans' official site reports.
Campbell was having a strong training camp, and over the first two preseason games he accumulated 17 tackles (11 solo), including 1.0 sacks, and one pass defended. The MRI will determine the severity of Campbell's knee injury and, assuming he makes the 53-man roster, his availability for Week 1 against the Bears on Sept. 8.