2010-11-27 Juan Manuel Marquez w rsc 9 Michael Katsidis, MGM Grand, Las Vegas, Nevada, USA - WBA/WBO/The Ring
Rios made a further defence of the WBA ‘second tier’ title when stopping Urbano Antillon in the third round of their contest at the Home Depot Centre, Carson, California, USA on 9 July.
After the WBA and WBO ‘interim’ titles became vacant at the end of August when Guerrero decided to move up a weight class, Richard Abril outpointed Miguel Acosta over 12 rounds at the Roberto Duran Arena, Panama City, Panama on 22 October to decide the vacant WBA version and Ricky Burns won the WBO crown when he outpointed Katsidis over 12 rounds at The Arena, Wembley, London, England on 5 November.
On 3 December 2011, Rios made a successful defence of his WBA ‘second tier’ title when stopping John Murray in the 11th round of their contest at Madison Square Garden, Manhattan, NYC, New York, USA.
Marquez was stripped of his WBA belt on 5 January 2012 for not meeting a mandatory challenger for more than 18 months, and then forfeited the WBO title on 26 January on moving up a weight division. On that date Burns was handed the WBO title.