UFC lightweight champion Anthony Pettis has sat on the sidelines through parts of his career.

That’s not something “Showtime” wants to do anymore.

So, despite suffering a knee injury in his title-winning fight vs. Benson Henderson this past August, Pettis is jumping right back into the Octagon, taking on Josh Thomson this December at UFC on FOX 9.

“My main goal is to stay active,” he said, during a recent press conference. “(My knee injury) wasn’t anything that required surgery, just a lot of therapy.

“I’m getting it ready for December.”

Pettis, who submitted Henderson late in the first round, added that he has had to stay off his knee for the most part, but feels he’ll be ready to go come fight-night.

As for his opponent, which changed from TJ Grant to Thomson, Pettis found a sort of role model in “The Punk.”

“I have a lot of respect for Josh,” Pettis said. “I want to be aruond when I’m 35 and still be on top of the lightweight division.”