Jason Timpf shares his six tiers of NBA Finals contenders at the midpoint of the season. What separates the Celtics, Nets, Warriors, and Bucks from the rest of the league? And will LeBron James' Lakers or Luka Doncic's Mavericks be able to fill in the missing piece to elevate their team to contender status? #volumeSee omnystudio.com/listener for privacy information.