The Ravens do have a high opinion of Ihedigbo, who had the best season of his NFL career last year with 101 tackles and three interceptions. However, they aren't expected to actively bid to keep him.
Ihedigbo, 30, visited the Detroit Lions last week. The Lions' defensive coordianator is Teryl Austin, his former secondary coach with the Ravens. Ex-Ravens offensive coordinator Jim Caldwell is Detroit's head coach.
Other NFC teams are involved, too, according to sources.
Ihedigbo had two forced fumbles and one fumble recovery and finished second on the Ravens in tackles behind inside linebacker Daryl Smith.
A 6-foot-1, 214-pound hard hitter with good range and blitzing capabilities, Ihedigbo has also played for the New England Patriots and New York Jets. He has 244 career tackles, six sacks and three forced fumbles.
Since the start of free agency, the Ravens defense has lost defensive tackle Arthur Jones to the Indianapolis Colts (five years, $33 million) and cornerback Corey Graham to the Buffalo Bills (four years, nearly $20 million).