Chicago Bears quarterback Jay Cutler and coach Lovie Smith didn't have a problem with Ndamukong Suh's violent sack on Monday night, but Brandon Marshall was not as nonchalant.

"A Suh. What u did to Jay wasn't cool. Great players don't have to do that," Marshall tweeted after the Bears' 13-7 win over the Detroit Lions at Soldier Field. "A Suh. Something I've learned and now passing down to you. Succeed with character."

The NFL has determined upon review that Suh's sack of Cutler was a perfectly legal play, a source told ESPN NFL Insider Ed Werder. The game officials were correct in their decision not to penalize the Lions, and Suh does not face a potential fine.

It was considered a worthwhile review and a close decision because Cutler is afforded the protections against roughing the passer, even outside the pocket, but Suh did not drive him into the ground so the hit was determined to be legal, the source said.

Marshall called in to "ESPN First Take" on Tuesday and did not back down from his comments.

"Last night the leg whip that Ndamukong Suh placed on our quarterback Jay Cutler, that was dirty. That was dirty," Marshall said. "He can be one of the best D-tackles that ever done it, but he cannot do that that way. If you look at it, c'mon man, this is not wrestling. You don't do that. That's not clean."