ALLEN PARK, Mich. -- Detroit Lions head coach Jim Schwartz said he liked Ndamukong Suh’s effort on the play which landed him with a low block personal foul call on Minnesota center John Sullivan, but that he should have looked up the field first.

“If that’s a wide receiver coming, I understand the effort,” Schwartz said Monday. “Our guys give great effort trying to make blocks. Almost to a fault. They give great effort trying to get a block and trying to help their team out.

“If that’s Adrian Peterson trying to go catch him, who might have a chance to catch him, or one of the wideouts, offensive lineman is not going to be able to catch him. At that point, he should have turned and looked upfield.”

Suh, however, did not. He instead went to block Sullivan and blocked him at the knees, resulting in a penalty and now, possible discipline from the NFL.

Schwartz also echoed what Suh told reporters Sunday, that he was aiming for a block at the waist but he missed.

“It was behind the play,” Schwartz said. “It wasn’t very far behind the play but it was behind the play enough that the offensive lineman wasn’t going to catch (DeAndre) Levy.

“But what he explained to me is he didn’t want to hit him high, because if he hits him in the head right there, that’s a peel back and there’s a penalty also. He was trying to hit him at the waist and ended up in a bad spot and went low.”

Schwartz also said Suh was not attempting to injure Sullivan, who had knee surgery in the offseason.

“I don’t think there was any attempt to injure or things like that,” Schwartz said. “It wasn’t 40 yards behind the play. It wasn’t hitting the guy from behind kind of thing like you’ve seen from other players recently, going low and hitting guys from behind.

“But in my mind the biggest thing was taking some momentum from us at that point and also taking the score off the board because that would certainly gone a long way to getting us out of the hole we were in early in the game.”