Steve Kerr achieved a rare feat by guiding the Warriors to the NBA championship in his first year as a head coach — and he acted as if his role was secondary, like he rolled out the basketballs and became a passive spectator.Kerr shaped these title-winning Warriors in many important ways, including refusing to take credit for the ways in which he shaped these Warriors.Do not underestimate the power of humility in connecting to a group of professional athletes.[...] with his team facing a surprising two-games-to-one deficit in the NBA Finals, Kerr boldly inserted Iguodala into the starting lineup and benched Andrew Bogut.The Warriors, instantly revitalized, reeled off three consecutive convincing victories to win their first championship in 40 years."Steve is just a very measured, humble, exuberant leader," said assistant coach Ron Adams, who has spent 23 years in the NBA and another 23 coaching at the college level.Only a good leader could make such a resounding and immediate impact.Kerr became the seventh rookie head coach to win an NBA title, and the first since Pat Riley with the Lakers in 1982.Kerr is only the third rookie head coach in more than 50 years to win the NBA...