Radivoje Kalajdzic KO10 Sullivan Barrera... Light heavyweight Radivoje ‘Hot Rod’ Kalajdzic (29-2, 21 KOs) knocked out 42 year-old Sullivan Barrera (22-5, 14K Os) live on ProBox TV in Florida on Wednesday. Kalajdzic's jab closed Barrera's right eye early in the fight, and though Barrera bravely soldiered on, the fight was pretty much all one-way traffic. With less than a minute to go, Barrera became exhausted and Kalajdzic took advantage, delivering four hard punches that sent Barrera through the ropes and onto the apron. Barrera should call it a career.