The Ravens saw Kansas State linebacker Arthur Brown still available as the later stages of the second round approached and pulled off a trade to make sure they nabbed him.
Baltimore acquired the 56th overall pick from Seattle for their second-round pick (No. 62), as well as a fifth-rounder (No. 165) and a sixth-rounder (No. 199) this year.
Hall of Fame elect Jonathan Ogden made the selection of Brown, who should help make up for the losses of Ray Lewis, Dannell Ellerbe and Paul Kruger.
ESPN.com's Mel Kiper projected Brown being selected at No. 45 by the San Diego Chargers, who instead picked Manti Te'o.
Of Brown, Kiper wrote, "Versatile LB with great athleticism. Fills an immediate need."
Brown led Kansas State with 100 tackles, including seven for loss and a sack, in 2012. He added two interceptions.
Update: In the third round, the Ravens kept addressing their defense by taking Missouri Southern State's Brandon Williams, a 6-foot-3, 325-pound defensive tackle.
Williams was named D2football.com National Defensive Player of the Year. He was the school's all-time leader with 27 career sacks. He finished second on the team with 68 tackles, including 16.5 for loss and 8.5 sacks, and five forced fumbles in 2012.