The Houston Texans have a short history from which to choose, but their best draft classes helped set up playoff runs. Naturally, they started with defensive stars.
Mario Williams, DE, North Carolina State, first round, 1st overall: Williams wasn't considered the consensus first overall pick that year, as many fans wanted Vince Young or Reggie Bush. The Texans went with defense, though, and fared well with this pick. Although Williams had a few injury issues, he helped elevate the Texans defense and went to two Pro Bowls while with the Texans.