On the day veterans were to report to training camp, the Ravens added three more to their roster Wednesday.
The team signed offensive guard Cord Howard, outside linebacker Darryl Blackstock and middle linebacker Ricky Brown.
Howard, 25, spent the last two seasons with the Buffalo Bills, but missed all of last season with a shoulder injury. He played in 10 games, starting four, in 2010.
Blackstock, 29, has 49 tackles, four sacks, two fumble recoveries and two forced fumbles in 74 games over five NFL seasons. He played his first three years with the Arizona Cardinals before spending one season with the Cincinnati Bengals and last year with the Oakland Raiders.
Brown, 28, has 74 tackles in six NFL seasons, all with the Raiders. He has only played 58 games (13 starts) during that time because of a series of injuries.