The Ravens declined to confirm the transaction because Walker hadn't taken a physical, a requirement before signing an NFL contract. Walker is expected to arrive at the Ravens' training complex today to finalize the deal.
"Yes, we have a deal," said Harold Lewis, Walker's agent. "He's flying out and will be there on Friday."
Walker is the first of Green Bay's crop of unrestricted free agents to sign with another team this offseason, though, the Packers were not expected to re-sign him. Walker earned $1.24 million in salary and bonuses last year with the Packers.
Walker was buried on the depth chart as the fifth cornerback for most of the year. He played in 12 games, rotating in as the nickel and dime back. He did not play in either of Green Bay's playoff games.
Walker never made the impact that the Packers hoped he would make in 2007, and was passed up by free agent Tramon Williams, Will Blackmon, and Jarrett Bush as top reserves behind Al Harris and Charles Woodson. Walker can be aggressive but simply didn't make enough plays to convince the Packers to play him more or re-sign him this offseason.
Walker had 10 tackles (9 solo), one pass defensed and 12 special teams tackles.
In Baltimore, Walker will compete for a backup spot behind starters Samari Rolle and Chris McAlister.