BJ Penn vs. Rory MacDonald full fight video preview for UFC on FOX 5

B.J. Penn is angry. You won't like B.J. Penn when he's angry.

Maybe you will, actually, considering a motivated "Prodigy" typically leads to stunning acts of violence inside the Ultimate Fighting Championship's (UFC) Octagon perpetrated against his unfortunate opponent.

That unfortunate opponent just so happens to be Canadian wunderkind Rory MacDonald and he doesn't feel unfortunate, not one bit. In fact, he's as confident as he's ever been. Eager, even.

"Ares" wants to get out and prove to the world that he's one of the best fighters on Earth who competes at 170-pounds. If he can knock off the seemingly reinvigorated Hawaiian, a lot of fight fans will start believing him but the KeyArena in Seattle, Washington, at UFC on Fox 5: "Henderson vs. Diaz" could be the site of the reincarnation of a pound-for-pound great.

Stay tuned.

Remember, too, that MMAmania.com will provide LIVE blow-by-blow, round-by-round coverage of UFC on FOX 5: "Henderson vs. Diaz," beginning with the "Prelims" bouts on Facebook scheduled for around 3:45 p.m. ET. In addition, we will also provide LIVE, real-time results of the main card action as it happens throughout the evening this upcoming Saturday, starting promptly at 8 p.m. ET.

For more on this weekend's event be sure to check out our complete "Henderson vs. Diaz" archive right here.