Edgar Sosa TKO4 Roberto Leyva... Mexican fans got to see two of their own compete for a WBC title, and Edgar Sosa prevailed over Roberto "Mako" Leyva by technical knockout in the fourth round to retain the 108-pound title. Sosa ended the fight with a liver shot that left Leyva unable to continue. Leyva is a former 105-pound titlist but seems well past his prime and did little to earn a title shot. He had been fighting and losing at bantamweight lately, so this fight was a WBC-sanctioned mismtach.  Sosa, 30-5, dominated the action up until the knockout. source: notimex