When Frank Vogel took over for Jim O’Brien midway through the 2010-2011 season, he understood an undeniable truth: the Pacers badly needed Roy Hibbert. As an assistant, Vogel cultivated a strong relationship with the big man. It was Vogel who convinced Hibbert to adopt a vertical defense, to forgo blocks and charges in favor of creating an eight-foot wall of humanity opponents would have to shoot over. Vogel worked tirelessly to develop that part of Hibbert’s game, creating drills that would eventually turn Hibbert into an elite defender.
Source: Sports Illustrated