For former UFC champion Frank Mir, a victory over Todd Duffee should at least stop one set of questions from being asked about his career.

Mir scored a second straight first round finish earlier this week, adding to his win over Antonio “Bigfoot” Silva by knocking Duffee out cold. He is now 18-9 in his career and owns 16 UFC victories.

“I think heavyweights mature later in life,” Mir told after the performance. “We come upon ourselves older.

“Hopefully, I don’t have to answer any more am I going to retire questions.”

Division champion Fabricio Werdum and contender Andrei Arlovski have both made triumphant returns to the UFC in recent years, and while Mir never left, a four-fight losing skid had many wondering if he was finished.

Instead, he looks rejuvenated and ready for another run at the belt.

One person impressed by Mir was Dave Sholler, the UFC’s vice president of public relations, who handled post-fight press conference duties.

“Frank looked fantastic,” Sholler said. “Frank’s made a new commitment to striking. He’s really putting it in seriously. The heavyweight division is really, really interesting right now.”