Reuters

The injury-plagued Ravens secondary has lost another player.

Asa Jackson, a cornerback who has started the last six games, will miss the rest of the season. Coach John Harbaugh said today that Jackson suffered a knee injury and will be shut down.

The Ravens already have four defensive backs — Jimmy Smith, Aaron Ross, Tramain Jacobs and Danny Gorrer — on injured reserve. Jackson will be the fifth.

Despite all the injuries to the secondary, the Ravens are 9-5 and will make the playoffs if they beat Houston in Week 16 and Cleveland in Week 17.