Promising, up-and-coming heavyweight Calvin Brock had a tougher than expected fight when he went up against Zuri Lawrence Saturday night on the undercard of Vargas-Mosley, but he ended any skepticism about a poor performance when he landed a crushing left hook that sent Lawrence to the canvas for over 10-minutes.   Thankfully Lawrence is okay and Brock spoke with one of Boxingtalk’s finest, Darren Nichols, about his obliterating knockout over Lawrence, how he felt his overall performance was for the fight, and what he plans to do next.