Tony Weeks, widely regarded as one of the best referees in the world, was appointed by the Nevada State Athletic Commission on Thursday to serve as the third man in the ring for the welterweight unification fight between pound-for-pound king Floyd Mayweather Jr. and Marcos Maidana on May 3 at the MGM Grand in Las Vegas.

Weeks, of Las Vegas, will be officiating his third Mayweather bout. He also served as the referee for Mayweather's unanimous decision victories against Miguel Cotto in a 2012 junior middleweight world title fight and Juan Manuel Marquez in a 2009 welterweight bout.

Weeks will be working his second Maidana bout. He was the referee for his action-packed majority decision win against Erik Morales in an interim junior welterweight title bout in 2011 at the MGM Grand.

Also at the Nevada commission meeting, the panel appointed the judges for the fight: Dave Moretti of Las Vegas, Burt Clements of Reno, Nev., and Michael Pernick of Florida.

Moretti will be judging his eighth Mayweather bout, Clements his third and Pernick, a very experienced championship judge, will be working his first Mayweather bout. Moretti and Pernick will each be judging their first Maidana bout while Clements will be scoring his second.

The commission also appointed officials for the Amir Khan-Luis Collazo welterweight co-feature. Vic Drakulich of Nevada will be the referee and Adalaide Byrd and Jerry Roth, both of Las Vegas, and Cathy Leonard of North Carolina will serve as the judges. Drakulich has worked one previous Khan fight, his fifth-round knockout of Zab Judah in a 2011 junior welterweight unification bout. He has never been assigned to a previous Collazo fight.

Byrd has judged one previous fight for each man without controversy. Roth has worked one Khan fight -- no controversy either -- and no Collazo fights while Leonard, the least experienced of the panel, will be scoring her first bout for each fighter. Officials were appointed for Khan-Collazo at Thursday's meeting because they are fighting for a regional title. The remainder of the officials for the card will be appointed next week.