Heat coach Erik Spoelstra discussed many training camp-related topics recently, including who may start at power forward this season, Anthony Chiang of the Miami Herald writes. As of now, it seems unlikely Jimmy Butler will slide down to the four. “My thing with that is I would love to be able to, at some point in Jimmy’s career, just start him at all five positions,” Spoelstra joked. “I’ve already started him at point guard. I’ve started him at his natural position, the three. I’ve started him at the two. I’ve definitely played him at the four, and he’ll play some…