This isn't a surprise, considering Smith was limited to 15 snaps last Sunday after his right knee swelled in pregame warmups. Smith, who injured his knee on Nov. 30, is considered day to day, according to coach John Harbaugh.
Smith hasn't missed a game in his four-year NFL career. His streak of 61 games played is the third-longest active streak on the Ravens.
Rookie running back Lorenzo Taliaferro also didn't practice because of a "foot and ankle injury," according to Harbaugh. Taliaferro had just taken back the No. 2 running back spot Sunday before getting injured.
Tight end Crockett Gillmore was present at practice but wasn't suited up. Gillmore missed Sunday's game with a back injury.