SANTA CLARA, Calif. – J.J. Watt is on a lot of minds at the San Francisco 49ers' facility this week.Trying to contain the Houston pass-rusher is Job One for the entire San Francisco offense. The reigning NFL defensive player of the year is off to another hot start, and the 49ers are bracing for their first meeting against him."He can ruin a game. He can ruin a game for his opponent," 49ers coach Jim Harbaugh said. "J.