Mayweather vs. Mosley Professional Boxing Testing Program:


USADA posts test statistics on a quarterly basis, by sport and by athlete, as soon as possible following the completion of each calendar quarter.


In response to a high volume of interest in the testing statistics for the professional boxing event held on May 1, 2010 between Floyd Mayweather, Jr. and Shane Mosley, the following is a summary of program information:

Both Mayweather and Mosley were tested a total of eight times by USADA between March 22, and May 1, 2010, with seven of the sample collections occuring with no advance notice leading up to the fight, and the eighth occuring immediately following the fight. All eight of each athlete's USADA sample collections included urine, and four of these collections for each figher also included blood testing. Samples were collected up through April 26 for urine testing and through April 13 for blood testing, as well as for both urine and blood testing immediately upon conclusion of the figh on May 1. Collections were conducted using a balanced test distribution schedule, and with no allowances for black-out or cut-off dates.


For general questions regarding USADA's anti-doping program, please visit the FAQs in the Resources section of this site. (Other policy and education publications and videos are also available in this section).
 
Athlete Date of Test Tested For: Determination




Floyd Mayweather March 22, 2010 Blood and Urine Negative
Floyd Mayweather April 1, 2010 Blood and Urine Negative
Floyd Mayweather April 3, 2010 Urine Only Negative
Floyd Mayweather April 6, 2010 Urine Only Negative
Floyd Mayweather April 13, 2010 Blood and Urine Negative
Floyd Mayweather April 21, 2010 Urine Only Negative
Floyd Mayweather April 24, 2010 Urine Only Negative
Floyd Mayweather May 1, 2010 (After Fight) Blood and Urine Negative




Shane Mosley March 23, 2010 Blood and Urine Negative
Shane Mosley March 29, 2010 Urine Only Negative
Shane Mosley March 31, 2010 Blood and Urine Negative
Shane Mosley April 7, 2010 Urine Only Negative
Shane Mosley April 12, 2010 Blood and Urine Negative
Shane Mosley April 20, 2010 Urine Only Negative
Shane Mosley April 26, 2010 Urine Only Negative
Shane Mosley May 1, 2010 (After Fight) Blood and Urine Negative