Lewis was limited in practices leading up to last Thursday's game against the 49ers, but did not play in the Thanksgiving night contest. That marked his second straight game missed due to the toe injury.
Cornerback Chris Carr (back) and linebacker Dannell Ellerbe (hamstring), both of whom also missed the 49ers game, were participating in today's session.
Defensive tackle Art Jones has passed his baseline test and been cleared to practice after missing the last two games because of a concussion.
Jones will wear a tinted visor to help prevent any sensitivity to light, but other than that, he says he is back to normal after a rough stretch in which he suffered heavy post-concussion symptoms.
The second-year man out of Syracuse said his entire equilibrium was thrown off after the concussion suffered three weeks ago against Seattle, and the Ravens' training staff had him wearing sunglasses indoor to prevent from any light-induced sickness.
"They did a really good job," Jones said. "They had me in the Bat Cave, in a dark room, doing the things that were necessary to get me back to where I was at. It's the little things, getting balance and everything together.
"It was frustrating at times, but I'm happy to be back. I feel thankful. It makes you realize what you had. Not that you didn't know, but it makes you humble."
Following today's morning walkthrough, the Ravens took a knee and said a prayer for Chester McGlockton, who passed away last night.
McGlockton was a four-time Pro Bowl defensive tackle during his playing days and was a coaching intern with the Ravens during training camp two years ago.
"Great man, great coach," head coach John Harbaugh said. "We said a prayer for his family and for his daughters for his passing."