The Cavs are in a really, really precarious predicament right now. Not only are they playing for the number one seed, they're playing to stay in the top-3.
If they lose tonight, then they'll be in the second seed only 2 games up on Washington and 2.5 games up on Toronto. That's not too much of a distance, so Cleveland isn't going to have the luxury of resting their guys down the stretch without putting not only the first seed in jeopardy, but also possibly the second seed.