Against the spurs, Yao had only 1 point in the second half. He played 42 minutes that game. Againt the Pistons, Yao had 2 turnovers in the key during the most crucial point of the game. His man was also left open twice and he fouled out(i dont blame him that much for that one) There is more evidence to you that Yao cant be relieable when you need him.