Kelly Pavlik stopped challenger Miguel Espino in the fifth round to retain his WBC and WBO middleweight titles in front of a hometown crowd in Youngstown, Ohio on Saturday night. Pavlik, who has a 36-1 record, twice knocked down Espino with uppercuts in the fourth round, and put him down for a third time in the fifth. Espino fought back after the final knockdown but his trainer waved a towel to signal his fighter had had enough.