Well if you look, the pass was a hop-step to Ray's left (as opposed to our left of Ray). Ray's just a pro, and the ball was soft enough so it didn't matter.
Well if
you look, Ray took a step right, from where he was spotting up, as Rondo drove. Since it was no-look, Rondo was passing from memory. If Ray hadn't moved in the first place, he wouldn't have had to budge to catch the pass. :-P
It's just as well. I think Ray's better at hitting shots with a little movement than a complete standstill shot.