Indianapolis Colts inside linebacker D'Qwell Jackson was suspended by the NFL for four games for violating the league's policy on performance-enhancing substances.
The NFL made the announcement Tuesday, and the suspension begins immediately for Jackson, who is eligible to return to the active roster on Jan. 2 should the Colts qualify for the playoffs. Indianapolis (6-6) is locked in a three-way tie with the Houston Texans and Tennessee Titans atop the AFC South.
Jackson collected a team-best 78 tackles, one sack and three pass deflections in 12 games this season. The 33-year-old Jackson is in his third year with Indianapolis after spending his first eight NFL seasons with the Cleveland Browns.
Jackson has recorded 1,185 tackles, 19.5 sacks and nine interceptions in 141 career contests since being selected by Cleveland in the second round of the 2006 draft.