ALLEN PARK -- Starting right guard Stephen Peterman had his knee tested on Monday instead of participating in training camp.

“From a concern standpoint, he’s been able to practice. Anytime a guy goes for a test, you’re always concerned what they’re going to find. This is the National Football League, it’s tough. I expect to see him back pretty soon,’’ coach Jim Schwartz said.

Peterman, missed the final seven games last year with an ankle injury that required surgery.

After the season was complete, Schwartz said that he had not realized how much they had missed Peterman until he watched game film with him on the line and without.

If it’s a minor injury this time, the Lions should be fine. If Peterman is forced to miss extended time, it will be an issue for the offensive line.

(Follow me on Twitter @paulapasche.)