Former UFC champion BJ Penn believes after a loss to Frankie Edgar retirement is his best bet moving forward.

Penn announced his retirement following the fight, but he’s done the same previously. “The Prodigy” hasn’t won a fight since a 2010 knockout victory over Matt Hughes.

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“I think I should stay retired,” said Penn, in an interview with his own personal website. “One think I know is that I put a lot of effort, a lot of energy into this camp. I trained for the last year to do this camp.

“I love training, I was looking to do five fights. After the last few fights I’m kind of getting tired.”

Penn turns 36 years old this December and is one of just two men to hold UFC titles in multiple weight classes. He also has wins on his resume over the likes of Hughes, Diego Sanchez, Kenny Florian, Sean Sherk, Renzo Gracie and Duane Ludwig.

In cutting down to featherweight to face Edgar for the first time, Penn worked with nutritionist Mike Dolce. During the interview, he was asked about that relationship, saying “As far as Mike Dolce goes, I would never hire him again for anything.” Asked to elaborate, Penn simply said “Next question.”