Baltimore Ravens S Tray Walker (concussion) has been ruled out for the Week 8 game against the San Diego Chargers. OT Eugene Monroe (shoulder) is listed as doubtful. FS Kendrick Lewis (knee) and OG Kelechi Osemele (knee) are listed as questionable, while FS Terrence Brooks (thumb) is listed as probable. Walker and Monroe did not participate in practice Friday, Oct. 30. Lewis and Osemele were limited during practice, while Brooks fully participated in practice.