He missed two games while serving a suspension for stomping on Packers offensive lineman Evan Dietrich-Smith. It was the fifth time the NFL disciplined him for an on-field transgression.
"I'm a guy who is known for my physical play," Suh said. "That's been the (trademark) of my game. There are lots of good things that come with that and there can be some bad things with it."
"He is starting to figure it out," Cunningham said. "I told him last year he probably was hitting 25 percent of his ability. He said, 'We have to change that.' He is on a mission. He's raising hell in practice."
The Lions will need Suh and his pass-rushing partners in crime to turn up the heat, because the Lions' secondary is very suspect.
So is the run game. The Lions ran for more yards than only three teams in the NFL last year, and they still have questions at halfback.
Jahvid Best is dealing with post-concussion syndrome and has had multiple head injuries. Mikel Leshoure is coming off an Achilles injury and a hamstring strain and is facing a two-game suspension.
Still, the Lions need to be more grounded this year.
In more ways than one.