Unbeaten lightweight Chris "Prime Time'' Colbert (12-0, 4 KOs) used his blazing hand speed and dazzling footwork to befuddle Albert Mercado (16-3-1, 2 KOs) on the way to unanimous eight-round decision. All three judges scored it 80-72 for Colbert - a shutout. Sensing that he was trailing by a wide margin on the scorecards, Mercado came out in the eighth round and decided to go for broke. He opened up with all-out assault to Colbert's body. Colbert sagged on the ropes and absorbed everything Mercado threw at him and came out firing. It was a futile play as Mercado of Hartford, Connecticut punched himself out. In the end, it was too little too late for Mercado as Colbert cruised to victory. "This wasn't my biggest test. I wanted to bang. I was telling him in his ear saying that I wanted to bang. I wanted to give the crowd a fight,'' said Colbert. "I came into this fight sick. I told my dad we have to do what we have to do. When I got to Vegas my cold got really bad. Runny nose, the who