Not only did clemens have extra motivation, but i think the whole team did. They wanted to win this one for the rocket. He said a while back "I don't want to speak to two empty chairs at my induction cerimony." refering to his stepfather who died when he was young and his mother. Now he's going to have to work in her memory and he has a history of being a workhorse.
But clearly the team was out there to win this one for rocket...i mean, when was the last time the stros scored ten runs...period?? let alone in a rocket start.