Owings Mills, MD -- (Sports Network) - The Baltimore Ravens have signed cornerback Frank Walker to a two-year contract.

Walker spent the 2007 season with Green Bay after playing his first four NFL seasons with the New York Giants. He is expected to compete for Baltimore's third cornerback slot.

"Frank can be a quality nickel for us, and he'll add athleticism and toughness to our special teams," said new Ravens head coach John Harbaugh on the team's website. "It's a good signing for us."

Walker appeared in 12 games with the Packers last season and registered 17 tackles. He has five interceptions in 53 NFL games.

The Ravens also signed free agent kicker E.J. Cochrane, who has been to training camp with Philadelphia and Green Bay over the past two seasons.