By Edward Chaykovsky

Floyd Mayweather Sr., father and head trainer of WBC/WBA welterweight and junior middleweight champion Floyd Mayweather Jr., says the only way possible that Manny Pacquiao can win on Saturday night is if he takes some form of performance enhancing drug. Otherwise, he predicts a one-sided beat down at the MGM Grand in Las Vegas.

Mayweather Sr. believes Pacquiao was using some form of performance enhancer during his huge run a few years ago when he swept through such fighters as Oscar De La Hoya, Ricky Hatton, Miguel Cotto, Joshua Clottey, Antonio Margarito, and others.

He accused Pacquiao of such misconduct a few years ago and the allegations forced Pacquiao's hand to file a lawsuit for defamation against Mayweather Sr., Floyd Jr. and others. The lawsuit was eventually settled.

Mayweather Sr. has downplayed Pacquiao's abilities in the ring. During his recent interview, he was told that he was being put on the spot to describe one thing that Pacquiao does well.

"You ain’t putting me on the spot, you’re taking me off the spot because the only thing I’m gonna tell you that he can do is when he take the random tests - he better be clean. That’s the only way that that he can win, if he takes something. Hey, that’s what he’s all about right there, that’s what it’s all about right there, believe me," Mayweather Sr. said to On The Ropes Boxing Radio

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"It’s gonna be an early stoppage anyway, believe me. If it ain’t no early stoppage I still think that Floyd can beat him anyway. So I think that if it ain’t an early stoppage, he gonna get beat on real bad."