IT WAS THE spring of 2018, and Chet Kammerer, a longtime member of the Heat’s player personnel department, was working out players for the upcoming NBA draft — one in which the Heat didn’t actually have any of their picks. At a private workout in Los Angeles, he saw a player who wasn’t on many draft boards, but one he felt personified what his team had so often found: an unheralded prospect, with a defined role, who could be a mainstay for years to come. That player was Duncan Robinson, the former D-III transfer turned Michigan standout. Kammerer turned to one of the then-24-year-old’s reps. “So, what’s the kid’s plan?” Kammerer asked. “This is our first workout,” the rep replied. “We don’t have a plan.”