Buffalo Run Casino in Miami, Okla. - Light heavyweight Radivoje 'Hot Rod' Kalajdzic (22-1, 15 KOs) scored two knockdowns for a fifth round stoppage of previously undefeated Travis 'The Notorious' Peterkin (16-1-1, 7 KOs).

Kalajdzic applied a lot of pressure from the opening bell and was pushing the tempo of the fight from mid to short range. Peterkin was able to slow things down by the final minute. Kalajdzic landed good right hands in the third, was still coming forward and walking Peterkin down with no respect. Peterkin was doing much to make Kalajdzic think twice before coming inside.

In the fifth, Peterkin finally went down after getting tagged with a hard shot. He got up and looked like a beaten fighter. Another combination and Peterkin went down hard on his back, with the referee waving off the contest very quickly.

This was Kalajdzic's first fight since losing a highly controversial and questionable eight-round split decision to unbeaten 2012 Olympian Marcus Browne last April 16 in Brooklyn.  A 6-foot-2 native of Bosnia and Herzegovina, he turned pro in June 2011.

He won his first 21 fights before losing to Browne in a bout in which many felt he won easily. Browne (18-0) landed an occasional hard shot, but Kalajdzic seemed to control the fight with his power and awkward style. Both boxers hit the deck, Kalajdzic (from what appeared to be a slip) in the first, Browne (clearly) in the sixth from a right hand to the head. Receiving credit for a knockdown in which no punch appeared to connect was the difference, and the fans booed when the scores of 76-75, 76-74 and 74-76 were announced.

Peterkin would have still have an unblemished record coming into this fight if not for losing two points in an eight-round majority draw with 2008 Dominican Olympian Lenin Castillo (12-0) on Aug. 1, 2015 at Barclays Center. Peterkin had a point deducted in the fourth for hitting after the break and in the fifth for a low blow. The scores were 76-74 and 75-75 twice.