Four Ravens did not appear to participate during the portion of practice open to the media Thursday.
Safeties Tom Zbikowski (back) and Haruki Nakamura and rookie kicker returner/wide receiver David Reed (concussion) were absent for the first 30 minutes. Reed and Zbikowski did not practice Wednesday, but Nakamura was not listed on the team's injury report.
Linebacker Brendon Ayanbadejo was present, but was not wearing his jersey or his helmet.
Tight end Todd Heap (pulled right hamstring), who was limited Wednesday, was present as was wide receiver Derrick Mason (ankle), who was also limited the previous day.
Offensive lineman Tony Moll (illness) and linebacker Jason Phillips (linebacker), both of whom did not practice Wednesday, returned. Center Matt Birk (knee) and wide receiver Marcus Smith (shoulder) also practiced.