Ravens reserve cornerback Asa Jackson has been suspended without pay for the team's next four games for violating the NFL's policy for performance-enhancing drugs.
His suspension begins immediately, according to the league. If Baltimore clinches a playoff spot, Jackson will be eligible to return to the active roster on the day following the team's first playoff game.
Jackson, a rookie fifth-round draft pick, has only played in three games this season. He has one special-teams tackle.