Williams should have big impact on defense

HOUSTON – Here are five observations from the Texans' July 31 and Aug. 1 practices:

1. If for some reason you still question the logic of the Texans selecting Mario Williams first overall over Reggie Bush or Vince Young all you need to do is pay a visit to Reliant Stadium and watch Williams practice, watch him move. In fact, all you need to do, really, is look at Williams. He is the definition of a specimen.