Four Ravens starters in free safety Ed Reed (strained hip/foot), linebacker Jarret Johnson (left shoulder), wide receiver Mark Clayton (right hamstring) and offensive tackle Jared Gaither (foot) did not practice today.
In addition, tight end L.J. Smith (ankle) and offensive lineman David Hale (concussion) sat out today's session.
On a positive note, linebacker Terrell Suggs (sprained ligament in left knee) and kicker Billy Cundiff (concussion) were limited. And quarterback Joe Flacco (knee/hip) practiced fully.
For the Detroit Lions, 13 players did not practice or were limited. Quarterback Matthew Stafford (separated left shoulder) did not practice.
Seven starters -- linebacker Ernie Sims (hamstring), defensive tackle Grady Jackson (knee), defensive end Dewayne White (toe), cornerback Will James (neck), rookie free safety Louis Delmas (ankle), offensive tackle Daniel Loper (back) and punter Nick Harris (left knee) were limited.