ALLEN PARK -- Lions safety Louis Delmas, who had not practiced since Wednesday because of a groin injury, participated in individual drills in Monday’s practice.

It was unknown if he was active for seven-on-sevens or team drills because they are now closed to the media. Still it was a good sign that he was on the field.

The true test for Delmas, who has not played in either preseason game, will be if he’s able to practice on Tuesday. He has practiced sporadically through training camp, but has not put together two straight days of practice. He injured his groin at the minicamp in late June.

The Lions looked the healthiest they have been since camp started with DE Jared DeVries (leg), CB Jonathan Wade (broken finger) and Ko Simpson (knee) participating in individual drills.

New DE Lawrence Jackson (groin) was in individual drills, but appeared to be walking off the field before seven-on-sevens.

Sitting out were TE Dan Gronkowski, CB Aaron Berry, CB Paul Pratt and CB Jack Williams who is still on the physically unable to perform list.

(Follow me on Twitter @paulapasche.)