ALLEN PARK -- Lions safety Louis Delmas, who is coming off a groin injury, practiced Tuesday morning marking the first time in training camp that he’s put together back-to-back practices. He went through a full practice on Monday.

He participated in individual drills on Tuesday morning, but the media could not watch the rest of the practice so it’s unclear if Delmas went through the seven-on-sevens and team drills.

With two practices today, it’s likely Delmas will sit out the afternoon. Also some of the players who sat out the morning practice could participate in the afternoon.

Missing from practice was defensive end Jared DeVries (knee) who had practiced on Monday.

Wide receiver Calvin Johnson was not practicing, but it could be that he was just given the morning off. I’ll check into this. Look for an update later.

Also not practicing were CB Paul Pratt, S Ko Simpson, TE Dan Gronkowski, RG Stephen Peterman (right knee), DE Lawrence Jackson (hamstring), T Jason Fox, G Trevor Canfield, CB Aaron Berry and K Jason Hanson who is coming off knee surgery.

(Follow me on Twitter @paulapasche.)