Bam Adebyo is not just the heart and soul of the Miami Heat at the moment, but he is also the main ingredient to head coach Erik Spoelstra's "ace" up his sleeve on the defensive end of the floor. It's Bam's versatility and non-stop motor that allows Spo to unleash his trademark zone defense.
Zone defense in the NBA was originally banned from the 1940s up until the early 2000s. It's technically only been "legal" in the league for a little more than 20 years, but there isn't a head coach currently in the NBA who has utilized it better, especially in recent history, than Spoelstra and the Heat.