Mosley regrets not having more testing of Pacquiao. Reuters

Floyd Mayweather Jr. (41-0, 25 KO) is not the only boxer who believes Manny Pacquiao (53-3, 38 KO) should be tested for performance enhancers: Sugar Shane Mosely (46-7, 39 KO) thinks Pacquiao deserves to be tested, too.

Mayweather claims that after Mosley fought Pacquiao, Mosley told Mayweather that he regrets not asking Pacquiao to take a drug test. He (Mosley) said, if I were you, I'd make him take the test.'

Mayweather has previously stated that he requests that the United States Anti-Doping Agency test Pacquiao.

But Top Rank's Bob Arum believes the USADA is biased towards non-Americans. He would prefer it to be conducted directly by the World Anti-Doping Agency.

We don't believe USADA is a neutral organization, Arum said. When you have a Philippine fighter and an American fighter? Wouldn't it be better if it would be done by the Olympic drug-testing organization?

Arum also stated that Pacquiao and his team have agreed to the random testing, but prefers WADA to handle, not USADA. Especially since Arum is under the impression that USADA favors Mayweather.

The USADA's media relations manager, Annie Skinner, replied we certainly do not have a bias against any athlete. All athletes are presumed to be clean until such time as they are proven otherwise.

Skinner even added, We completely adhere to all the international standards as promulgated by WADA (World Anti-Doping Agency), Skinner said. No other organization in the US does the type of gold standard testing that we do.

Mayweather says that he has never accused Pacquiao of using any sort of performance enhancers.

Instead, he stated that he was cleaning up the sport of boxing.