Updated Dec. 12, 2011 @ 9:51 p.m. ET
The Jaguars placed CB T.J. Heath (shoulder) and S Chris Prosinski (thumb) on injured reserve Monday and signed CBs Darcel McBath and Robert McClain.
Prosinski had five special-teams tackles and a fumble recovery. He had 14 total tackles on defense.
McBath, a third-year pro, played in seven games for the Broncos last season and recorded 17 tackles. McClain played in all 16 games last season for the Panthers as a rookie and made 16 tackles.
The team also added PK Brandon Coutu to the practice squad.
The Jaguars have placed 27 players on injured reserve this season, including five who have since been waived/injured, leaving 22 currently on I.R.