The original Bears "Sack Man," all-time Bears sack leader Richard Dent, said Mack is approaching a time in the league where it usually does get better or get worse.
"There's a lot of film out there, so the point of it is, people now see things," Dent said.
Players between four to six years are susceptible to opponents spotting weaknesses, Dent said. Mack will be in his sixth season. "You've been doing the same thing, people don't forget it," Dent said. "I went through it. It took me a while. I looked at (Mark) Gastineau. He went backwards. I looked at everybody else and I just couldn't figure."
Eventually Dent did figure it out, kept going and wound up with 137 1/2 career sacks, tied for ninth in league history. "But I was around good guys like (Dan) Hampton and Steve (McMichael) and Mike Hartenstine and how they used their hands and stuff," Dent said. "To me, I just thought about that and paid attention and scerewed up that data about making yourself better because sooner or later people are going to catch up to you and you've got to have another wrinkle."
Mack has 53 career sacks, and Dent said it's up to him to occasionally change up the way he's using his hands and maybe even for the Bears to stop moving him around from one side of the line to the other so often.
"But what I see is how he used that one stab with his right hand, then again on the right side it's a little difficult," Dent said. "It's different. So the point of it is I don't know why they flipped him so much because I think he's better on the left and I think (Leonard) Floyd is better on the right. And let it go.
"If you look at it, they're two kids and you've got Hicks in the middle. You can't double everybody."