Chalmers plays with their great starting lineup.If that was true, then why does Lebron only post a +21?
Cole plays with their horrid bench.
There's your answer.
Because Lebron plays more minutes than the rest of the starters ... and even HE is dragged down by their horrid bench ...
Food for thought:
Lebron has played 38.4 mpg this year in all 49 of Miami's games - in other words, he's played almost 80% of Miami's minutes. (a little less because I'm ignoring OT games).
Lebron's individual ORtg is a ridiculous 124 points per 100 possessions and his DRtg is 103 (using basketball-reference.com numbers). Which means that for every 100 possessions he's been on the floor, the Heat are outscoring their opponents by a freakish +21!
For almost 80% of all their minutes.
But the Miami Heat's team
ORtg is 112.3 and it's DRtg is just 105.4. For a NetRtg of just +6.9!
Now, +6.9 is still a very good NetRtg for a team. That definitely makes them a contender.
But boy, does that team suck in the ~20% of their minutes when Lebron is not on the floor.
If Lebron got injured - forget it. That team would be toast. Even with him, they aren't a lock, unless Lebron plays 48 mpg.