Burks (knee) didn't practice Thursday, Jim Wyatt of the Titans' official site reports.
Burks was limited during Wednesday's session, so his absence Thursday represents a step back in terms of activity. The Titans haven't revealed whether Burks' downgrade in participation was the result of a setback, or more a matter of the Titans managing the wideout's practice reps. Friday's injury report will reveal whether Burks approaches Sunday's game against the Bengals with an injury designation or is fully cleared to play.