The problem with a rib injury like that is it doesn't heal any faster by not playing so it wouldn't benefit him anymore than playing with it. He has been wearing a rib belt I've noticed but its definitely messed with his shot, he is getting no arc on his shots, he can't extend his arms as high as he normally would. It hurts just to breathe with something like that much less shoot a ball. It'll take about a month to full heal unless something is cracked, which I doubt it is I couldn't see him playing. He still provides great defense and energy so he will play with it.
