The one thing this season has said regarding the Cavs at least, is they are just down right terrible without James. Last night James sat for 2 minutes and the Cavs were outscored by 12 points in those 2 minutes. That has been pretty consistent all year, and it is why James is getting tired at the end of games. He just can't get rest during the game without the Cavs imploding against good teams (even against bad teams this happens, but they are still able to win most of those games). The Cavs just flat out need to be able to play at least average ball without James if they ever want to win another title (obviously not this year, but in the future).