Smith, 31, is the Jacksonville Jaguars' all-time leading tackler. He was limited to two games last season because of a groin injury.
The Ravens were looking to add depth at inside linebacker. Both starters from the Super Bowl, Ray Lewis and Dannell Ellerbe, are gone. The Ravens' projected starters at inside linebacker, Jameel McClain (spinal cord contusion) and rookie Arthur Brown (sports hernia), are expected to be sidelined until training camp.
A nine-year veteran, Smith has started 124 of 126 career games.