AUSTIN, Texas -- Going forward, Manny Diaz will have a hard time looking forward. An almost impossible time, really, what with all the time the Texas defensive coordinator will have to spend looking over his shoulder. That's because, right there, just behind Diaz, is where Mack Brown has been standing for the past two weeks, and will be a fixture for the foreseeable future. "He used to watch the offense a lot; now he is watching us more," safety Kenny Vaccaro said of Brown. "He is in our meeting rooms, saying little things here and there as we watch film."