The Ravens have been a relatively healthy club on defense all season, with SS Tom Zbikowski the only starter (he has since lost the job to Bernard Pollard) missing any time in the first nine games. Nevertheless, there are a couple of injury concerns on that side of the ball, with MLB Ray Lewis' toe injury the biggest worry. The Carroll County (Md.) Times reported Thursday that Lewis would miss the Week 11 game vs. Cincinnati and perhaps multiple games with the injury. Lewis missed the entire week of practice leading up to Sunday's game and is listed as questionable. Brendon Ayanbadejo is listed as Lewis' backup. DT Haloti Ngata, meanwhile, is contending with a thigh injury that caused him to miss some practice leading up to the Week Nine game vs. Pittsburgh. Ngata, who has said the injury is improving, was credited with a season-high 11 tackles (eight assists) at Seattle in Week 10. "I'm up and down," Ngata said earlier this week, according to the club. "I think the week after I actually hurt my thigh, I was probably like 80 percent. It was a little bit more last week. It's getting better and better each week. I've just got to make sure I take care of it."