Ravens' Art Jones misses second practice

OWINGS MILLS, Md. -- Baltimore Ravens defensive lineman Arthur Jones didn't practice Thursday after suffering a concussion Sunday.

Jones, the only Ravens' starter who didn't participate Thursday, has not received clearance to resume practicing. He leads all Ravens defensive linemen in tackles (52) and sacks (four).

Center Gino Gradkowski was limited in practice and was wearing a brace on his right knee. Three other starters were limited: running back Ray Rice (thigh), linebacker Elvis Dumervil (ankle) and wide receiver Torrey Smith (thigh).

Here's the complete injury report for the Ravens:

Did not participate: DL Art Jones (concussion), CB Asa Jackson (thigh).

Limited participation: RB Ray Rice (thigh), LB Elvis Dumervil (ankle), WR Torrey Smith (thigh), C Gino Gradkowski (knee).

Full participation: LB Albert McClellan (neck).