ALLEN PARK -- Safety Louis Delmas and linebacker DeAndre Levy were not on the practice field this morning (Wednesday) for individual drills at the start of practice. The rest of practice is not open to the media, but Delmas was not toting his helmet and Levy was nowhere in sight. Both are dealing with groin injuries.

Delmas said on Monday -- without hesitation -- that he would play on Sunday in Chicago. Holding him out today could be a part of the plan. He injured his groin in the minicamp in late June and has slowly been making his way back. He played in just one preseason game.

Delmas, who started 15 games last season, could play without practice. But he will be playing in a secondary that has no faces from last season and they have not had much practice time together due to injuries.

Levy injured his groin on the first play of the third preseason game which was on Aug. 28. He has not practiced since.

Also, on Wednesday the Lions filled their final spot on the practice squad with tight end Joe Jon Finley who played at Oklahoma and was signed last year as an undrafted free agent by San Francisco.

(Follow me on Twitter @paulapasche.)