The Ravens confirmed that a pair of Pro Bowl starters in free safety Ed Reed and outside linebacker Terrell Suggs did not participate in Thursday's practice.
The team described Reed as dealing with an injured shoulder and Suggs as being bothered by an injured knee. Both players had fully practiced Wednesday, but their status for Sunday's game at the Seattle Seahawks is uncertain.
Rookie running Anthony Allen was also downgraded to no practice because of a thigh injury. He had been limited Wednesday.
Center Matt Birk (neck) fully participated in Thursday's session after sitting out Wednesday.
Wide receiver Lee Evans (left ankle), linebackers Brendon Ayanbadejo (post-concussion symptoms) and Dannell Ellerbe (hamstring) and tight end Kris Wilson (calf) and rookie running back Anthony Allen (thigh) were limited for the second straight day.
Rookie cornerback Chykie Brown (knee), who fully participated in Wednesday's session, was removed from the injury report.
Seattle had just two injury concerns regarding starters. Wide receiver Sidney Rice (foot) was downgraded from limited participation. He had practiced Wednesday without being listed on the injury report.
And quarterback Tarvaris Jackson (pectoral) was upgraded from limited to full participation.