HOUSTON — Just when his ankle seemed fine, Stephen Curry hurt his right knee in Sunday's game against the Rockets. [...] everything changed on the final play of the half, after Andre Iguodala's emphatic left-handed dunk tied the game at 56-56. There was no contact on the play - Ariza missed his long three-point attempt at the buzzer - but Curry slipped, fell awkwardly to the court, sort of did the splits and immediately grabbed his right knee. Earlier in the half, Curry had called for a ball boy to wipe up a wet spot on the court.