The Ravens have struck a one-year, $730,000 contract with veteran cornerback Derek Cox.
The team cut undrafted rookie wide receiver Jace Davis to create a spot for Cox, who is expected to play against the New Orleans Saints Thursday.
His salary-cap figure is $570,000 under the veteran minimum salary benefit.
The Ravens are thin at cornerback with injuries to top corners Jimmy Smith (chest bruise), Lardarius Webb (lower back) and Asa Jackson (sprained ankle).
Cox was cut this week by the Minnesota Vikings after recording five tackles in three preseason games.
He previously played for the San Diego Chargers. He had 38 tackles and one interception last season for the Chargers after signing a four-year, $20 million deal last year.
However, Cox was repeatedly benched in San Diego due to inconsistent play and eventually lost his starting job to Richard Marshall. He was cut in March and signed by the Vikings 11 days later.
Cox struggled as a slot cornerback in San Diego after having success outside with the Jacksonville Jaguars, who drafted him in the third round in 2009.
He also faced the pressure of being a highly-paid free agent acquisition in San Diego.
In five NFL seasons, Cox has 241 career tackles and 13 interceptions.
He was a 2010 Pro Bowl alternate and in 2012 had a career-high 60 tackles with four interceptions and a forced fumble.
In his first NFL game in 2009, Cox intercepted a Peyton Manning pass and also recovered a fumble. He finished with 58 tackles and four interceptions as a rookie.
At William & Mary, he was a two-time All-Colonial Athletic Association selection. As a senior, he intercepted four passes and returned two for touchdowns.