So says the guy himself. From KC at shootaround:

Derrick Rose said he will warm up tonight and play if that goes well. Admitted he still has discomfort though. Also said he is playing for sure Sunday in New York if he doesn't play tonight vs. Celtics.

That's barring a setback of course.

Of course. No (announced) setbacks is always good, so I'll take that non-news as good news whether it's true or not.

For his part, Thibs said the same bullshit he always does.