Porter-Diaz II offers appetizer

LAS VEGAS -- The fight week festivities for the Floyd Mayweather Jr.-Canelo Alvarez megafight on Saturday night kicked off on Tuesday afternoon with the grand arrivals of the fighters walking down a red carpet in the packed and raucous MGM Grand lobby.

But just before that, those fans were treated to the final news conference for the appetizer

boxing show on Thursday night (Fox Sports 2, 10 ET) at the MGM's Premier Ballroom.

The card is headlined by a rematch between welterweights Shawn Porter (21-0-1, 14 KOs) and Julio Diaz (40-8-1, 29 KOs), who fought to a draw in an excellent fight in December.

"It's showtime," said Porter, who was the heavy favorite against Diaz in the first fight but was surprisingly held to a draw by the former two-time lightweight titleholder. "This is a big week for me. I'm very excited. This is my first time fighting here in Vegas, the main event on the card. It doesn't get any better than that. I had a great camp. Can't wait to bust this joker up again, take care of business and set the record straight."

Diaz said the rematch will not go the distance.

"A couple of years ago, the boxing world retired me; supposedly I was done," Diaz said. “But here I am still headlining shows. I never gave up and I kept on working hard, and I'm still here. The first time around, we had a good fight. I was coming back, gaining my confidence. Right now, I think I'm where I need to be. I'm very excited and I'm coming with everything. This fight, we will not need judges. Any way it goes, it's not going to a decision. I guarantee you that."

In the co-feature, super middleweight prospect Badou Jack (15-0, 10 KOs), a former Olympian and one of the most promising fighters under the banner of Mayweather's promotional company, faces his best opponent yet in Marco Antonio Periban (20-1, 13 KOs), who fought for a vacant world title in his previous fight but lost a decision in a brutal battle with Saki Bika in June.

In a third televised fight, junior middleweight prospects Hugo Centeno Jr. (19-0, 10 KOs) and Julian Williams (13-0-1, 7 KOs) will square off.

The card also will feature junior middleweight prospect Jermall Charlo (15-0, 11 KOs), the pro debut of 19-year-old junior featherweight Diego De La Hoya (Oscar's cousin) and three 2012 U.S. Olympians in welterweight Errol Spence, middleweight Terrell Gausha and heavyweight Dominic Breazeale.