Pacquiao Mayweather

This May 18, 2009, file photo shows Floyd Mayweather Jr. at a news conference in Los Angeles. Mayweather has said that every fight he takes, beginning with Mosley, will include Olympic-style blood testing along with the typical urine tests required by most athletic commissions. That means the fighters could have blood drawn in the days leading up to the fight. (AP Photo/Mark Avery, File)