Pacquiao's Alex Ariza shreds USADA director Travis Tygart

As an assistant to Hall of Fame trainer, Freddie Roach, strength and conditioning guru, Alex Ariza, works with seven-division champion, Manny Pacquiao, WBA junior welterweight king, Amir Khan, and unbeaten junior middleweight prospect, Vanes Martirosyan.

All three are under similar programs, which involve special dieting and nutrition and workout regimens developed by a team of experts and largely overseen by Ariza.

"Coming into a fight, they're ready to perform and to give the fans what they want. I think that you see them all making weight without any problems. You see their physiques are all very symmetrically well built. They're defined. And as far as their conditioning, they're second to none," said Ariza, who is in New York with Martirosyan as he prepares for Saturday night's clash of unbeatens against New York's Joe Greene to be held at Yankee Stadium.

"My guys come in and they're ready to fight. They're going to give you a show 100 percent. The one thing that you're never going to see is our guy getting tired or getting to the point where he can't throw any more punches," said Ariza to BoxingScene.com.

"Or when it's time to really get down to business and to get down and dirty, the energy, it's going to be there for them. And that's what they're there for. They're there to put on big performances, and that's what Manny, and Amir, and, Vanes are able to do in there."

Ariza said that it is a testament to their overall conditioning that people may perceive any of the three fighters -- Pacquiao in particular -- as being under the influence of performance enhancing drugs.

"You know, to be honest with you, I sort of take that as a compliment," said Ariza. "I mean, we know who is on the level, and we know that what we're doing with Manny and all of our other fighters are is all on the level. So, to us, it's a compliment. It means that we're doing something right."

Ariza doesn't believe that random blood and urine testing has a place in boxing, unlike the views of Travis Tygart, director of the United States Anti-Doping Agency.

"I mean, let's be realistic. BALCO [founder Victor Conte] was beating USADA for the past five years," said Ariza. "They've probably tested his [Conte's] athletes three hundred times and they never really got caught. I mean, who have they really caught?"

A potential March 13 bout between Pacquiao and Floyd Mayweather dissolved over issues of random drug testing: Mayweather wanted it; Pacquiao didn't.

As a result, Pacquiao faced and defeated Joshua Clottey in defense of his WBO welterweight crown on March 13, and, Mayweather did the same agianst Shane Mosley on May 1, the latter, only after both fighters were subjected to the USADA's random testing throughout their preparation for the bout.

Ariza believes, however, that USADA's involvement was unnecessary.

"I think that they're giving too much air time to Travis. He needs to go back to doing what he does best, which is to sit behind a desk and try to get other sports to believe that what he's doing is some kind of an extraordinary movement," said Ariza.

"I think that he thought that he was going to come in here and throw a bunch of big words around and that people were going to be 'Wowed' by that. And it just doesn't happen that way. Travis doesn't know this sport. He's never laced up a pair of boxing gloves and put them on. Travis is not an athlete himself, like that."

"Travis needs to shut up. He needs to go back and to sit behind a desk and answer phone calls and shut up. This is a real sport. These guys train hard. We don't need these guys and their little kits showing up when these fighters are in the midst of training and making weight and doing the real work."

"We don't need these guys showing up and making themselves feel as if they have some type of importance as far as being in the fighters' camps. You know, they don't serve any real purpose."