By Edward Chaykovsky

Floyd Mayweather Sr., father and head trainer of WBC/WBA welterweight and junior middleweight champion Floyd Mayweather Jr., admits his son is not the same fighter from several years ago. But, he still believes his son is capable of beating every single opponent in the welterweight division.

This coming Saturday night at the MGM Grand in Las Vegas, Mayweather takes part in the biggest fight of his career when he faces WBO champion Manny Pacquiao. The fight has been hyped for the last six years and everyone expects the pay-per-view bout to break every possible financial record.

Whether it's Pacquiao, British star Amir Khan or undefeated banger Keith Thurman - Mayweather Sr. is confident his son will beat all of them with ease.

"I don’t care who he is, I don’t care who you are, he’s not the Floyd he was yesterday, he’s not that Floyd. He is the Floyd that can whoop Pacquiao and the rest of these guys that are around him, he’ll whoop all of them. The guys that are still fighting in his weight class, he can still whoop their ass," Mayweather Sr. told On The Ropes Boxing Radio .

"Anybody that’s been fighting as long as Floyd’s been fighting, something is leaving you whether you’re still working at it or not, it’s still gonna leave you. That’s just the law of the land. The thing is, you continue to get older and when you get older, sometimes things might not be as you see it is because your body sometimes doesn’t respond. Overall when anybody gets older, you lose something. Every year you lose something.