LAS VEGAS ?Ghana?s Ben Tackie (28-6-1, 17 KOs) used a persistent body attack to break down Wilfredo Negron?s (25-10, 19 KOs) defense in a welterweight bout scheduled for 10 rounds. A right hand through Negron?s gloves in the third round and a straight right in the fifth round forced referee Robert Byrd to halt the fight in the fifth round.