The Golden State Warriors and Cleveland Cavaliers are preparing for the start of the NBA Finals, but 28 other teams already are evaluating their ever-changing draft boards. Sheridan Hoops has done three mock drafts thus far and probably will do at least three more. Why? Because players can help or hurt themselves with their performances at the NBA Draft Combine in Chicago and in team workouts. Four players who have improved their stock considerably are Richaun Holmes, Rakeem Christmas, Jordan Mickey and