Linebacker Khalid Abdullah, a fifth-round draft choice out of Mars Hill College, signed a three-year contract.
He had 28 sacks and two 100-yard interception returns in college.
The Bengals open camp July 27 at Georgetown, Ky.
• DRUG SUSPENSIONS: The NFL suspended Minnesota Vikings tight end Byron Chamberlain and Green Bay Packers linebacker Torrance Marshall for the first four games of the season for violating the league's policy on banned substances.
