ALLEN PARK -- Defensive end Jared DeVries went to see a specialist for a second opinion on his left knee which has hampered him since the beginning of training camp. He practiced Monday for the first time in weeks, but then was out Tuesday and Wednesday.

Coach Jim Schwartz said it’s too early to determine if DeVries is a candidate for injured reserve.

“It really depends on the opinion -- whether it’s a surgery, whether it’s not a surgery, how long if it would be a surgery,’’ Schwartz said. “That’s one reason he’s out of town to get those questions answered.’’

DeVries, 34, missed all of last season, after he ruptured an Achilles tendon during training camp.

Safety Louis Delmas didn’t practice on Wednesday, but it was part of the plan according to Schwartz. Delmas is expected to practice on Thursday to prepare to play in Saturday’s preseason game against Cleveland.

(Follow me on Twitter @paulapasche.)