From Dave Birkett of Birks Eye View:

With no trades in the works, the Lions decided this morning to place quarterback Jon Kitna on injured reserve. The decision should be announced later today.Kitna suffered a back injury in the first half of the Lions' 34-7 loss to Chicago two weeks ago. He did not play last week against Minnesota and did not travel with the team. Dan Orlovsky completed 12-of-21 passes for 150 yards in Kitna's place against the Vikings and will make his second career start this week at Houston. Kitna, who has muscular damage in his lower back, finishes the season with 758 yards passing, five touchdowns and five interceptions. He never seemed to buy fully into new coordinator Jim Colletto's offense, and, with one year left on his contract, may have played his last game as a Lion.