sentences:  Guerrero was scheduled to face Marcos Maidana in August for the WBA junior welterweight title, however, he was forced to pull out of the bout after suffering a torn tendon in his rotator cuff.He underwent surgery to repair the injury and was out of the ring for 6 months.Guerrero returned to the ring by jumping two weight classes to face unbeaten top 10 welterweight Selcuk Aydin.