Rondo's one of the toughest players in the league, so I'd never say never with this. The big difference between this situation and 2011 with his elbow against Miami is that the thumb injury is on his right hand, whereas the elbow injury was on the left side. He more or less played with one hand in 2011, but was able to do so because it was his right hand. If he can play exclusively with his left hand, be effective and avoid injuring it further, all the power to him.