Ngata, 30, had 31 tackles with two sacks, two forced fumbles and two interceptions through 12 games for the Ravens, who must now continue their playoff push without the five-time Pro Bowler.
The Ravens are among three
Ngata will be eligible to return for the postseason if Baltimore can manage to win the division or grab a wild-card berth. A feat made even more difficult with the loss of Ngata.
Rookie Timmy Jernigan, a second-round pick out of Florida State, will likely start in Ngata's place. Jernigan has appeared in eight games, recording 12 tackles and two sacks.