Nick Diaz caused quite a stir during the UFC 158 post-fight press conference following his unanimous decision loss to welterweight champion Georges St-Pierre in Montreal, revealing that he's never paid taxes in his life.

“I just have to invest a little more money (in training),” Diaz said when asked what he would do if he does stay in the UFC instead of retiring as he hinted at. “Now that I have a little bit more money. I've never paid taxes in my life and I'll probably go to jail.

“No one wants to hear about that, no one wants to hear about that kinda talk or what's really going on with me. I might as well just be a kid.”

UFC president Dana White told the media following the press conference that he's concerned about Diaz and his taxes, and that he'd rather have ninjas after him than the Internal Revenue Service (IRS).

“At the end of the day, Nick has been in the sport forever, he wanted a shot at the title and he got a shot at the title and he got paid a lot of money for it,” White said. “What's sad is, he's gotta go pay his taxes, that's going to be (expletive); that will be sad.

“If someone doesn't take care of that kid and get him set straight, then you know. He came out here publicly tonight and said he's never paid taxes in his life. Holy (expletive)! I mean, that's bad. Somebody better handle that with his check and make sure that kid doesn't end up with nothing.”

(Follow @AndrewPMMA on Twitter)