Tom Thibodeau has been an NBA head coach for 62 games. When you consider guys like Lenny Wilkens and Don Nelson stalked the sidelines for more than 2,000 games each, 62 seems like a very small number. But it's a number. And right now? Of 294 men to have ever been NBA head coaches, Tom Thibodeau of the Chicago Bulls has the highest winning percentage.
According to Basketball-Reference.com's exhaustive database, Thibodeau's current .710 winning percentage outpaces Phil Jackson (.705) for the top spot in league history. Jackson, of course, has done it over 20 years and 1,600 games. But early on, Thibodeau is keeping pace with the last great Bulls head coach. (No slight meant to Tim Floyd.)
Nine coaches, by the way, share the dubious honor of having gone 0-for-career as head coaches. None served as the official head coach for more than six games; Carl Bennett coached the 1948-49 Fort Wayne Pistons to an 0-6 start before being replaced by Curly Armstrong, who played for those Pistons. But Bennett's most important contribution to basketball was in helping along the merger of the BAA and NBL in '48. I bet Thibodeau hasn't created a major sports league!