The Ravens placed 2013 second-round pick Arthur Brown on season-ending injured reserve due to a hamstring ailment.
Brown, in two seasons, has yet to play many meaningful snaps on defense and has been either inactive or relegated to special teams in most games. He sustained his hamstring injury last week against the Cleveland Browns.
Brown moving to injured reserve allows the Ravens to simply use that roster spot to activate defensive tackle Haloti Ngata, who is eligible to play in the postseason after serving a four-game suspension for violating the NFL's performance-enhancing drugs policy. Ngata admitted to using Adderall without clearance from the NFL after testing positive for it, which triggered the four-game ban.
"I just want to start off by saying I did make a mistake," Ngata told reporters this week. "I'm glad the team was able to get us in the playoffs, and hopefully I can help them out in this playoff run."
Ngata's return comes at a great time since the Ravens will be without rookie Timmy Jernigan this Saturday. Jernigan has a foot/ankle injury that will prevent him from playing in the Wild Card round.