Without a major MMA card going on this weekend, ProMMAnow.com will be focusing on the Floyd Mayweather (40-0) vs. Shane Mosley (46-5-1) boxing match going on tonight at the MGM Grand Garden Arena in Las Vegas, Nev. The action airs live on Pay-Per-View, and we will be providing live round-by-round updates throughout the fight. Mayweather weighed in at 146 lbs. and Mosley weighed in at 147 lbs.

Will Mosley be able to solve the Mayweather puzzle, that so far, no one has been able to? Will the 38-year-old Mosley’s power and experience be too much for the undefeated 33-year-old Mayweather? Stick with us and find out.

An interesting note about this fight is the much talked about “Olympic-style” drug testing that was implemented for the first time in a professional boxing match. It was announced on tonight’s broadcast that the fighters were tested in excess of eight times by the U.S. Anti-Doping Agency.

Officials collected blood and urine samples and random unannounced intervals, more than eight times, leading up to the bout. If this type of drug testing were used in all sports it would wipe out the problem of athletes using illegal performance enhancing substances.