In late September 2016, Houston Rockets coach Mike D’Antoni announced that his star player, James Harden, would be switching positions to play point guard. This seemed like a peculiar decision at first. Harden had played shooting guard his entire career up to that point, and was just coming off a season in which he did an awful lot of shooting, averaging 29 points and finishing third in the league in usage rate. Running an entire offense and getting teammates involved is a difficult thing to just pick up on the fly. But Harden did it.