Floyd Mayweather Jr. and Manny Pacquiao were each tested 19 times for performance-enhancing drug use both prior to and following their May 2 mega-fight at the MGM Grand Garden in Las Vegas, and both men passed all of the examinations.
According to records provided by the Nevada Athletic Commisison, each man gave 11 urine and eight blood samples. Among the special analyses given to the samples were Carbon Isotope Ratio Mass Spectrometry (CIR/IRMS) testing as well as tests to detect usage of EPO and human growth hormone.
Mayweather gave urine on March 13, 18, 19 and 28, April 2, 10, 15, 21 and 27 and May 1 and 2. He gave blood samples on March 13, 18 and 28, April 2, 10, 15 and 21 and May 2.
Paquiao gave urine on March 14, 17, 23 and 24, April 1, 9, 16, 22 and 27 and May 1 and 2. Pacquiao gave blood samples on March 14, 17 and 24, April 1, 9, 16 and 22 and May 2.
Mayweather also applied for, and was given, a therapeutic use exemption (TUE) for rehydration purposes after the May 1 weigh-in. He took two separate mixes. The first was a mixture of 250 ml of saline and multi-vitamins. The second was a 500 ml mixuture of saline and Vitamin C. He was urine tested both before and after taking the solutions.
Nevada rules permit the mixes that Mayweather took, but because USADA was overseeing the testing he applied for and was granted the TUE for them.
All tests came back negative.