Interim WBA Super Middleweight Champion David O. Morrell Jr. (4-0, 3 KOs) earned a dominant knockout victory over Mike Gavronski (26-4-1, 16 KOs) in three rounds Saturday night in the main event of FOX PBC Fight Night and on FOX Deportes from the Shrine Auditorium and Expo Hall in Los Angeles. A former Cuban amateur star, the southpaw Morrell, now hailing from Minneapolis, came out throwing fast, accurate and powerful combinations from round one and almost immediately had Gavronski, from Bellevue, Washington, staggering groggily around the ring. Morrell finally dropped the dazed Gavronski for a nine count with a fearsome combination of shots at the end of the first round. The relentless attack continued in rounds two and three, as Morrell delivered an array of power shots. After a final clean uppercut sent Gavronski's head snapping back, Referee Jack Reiss had seen enough and waved it over at 2:45 of round three. Through the almost eight minutes of action, Morrell threw 208 punch