Andy Pettitte's sworn statement that Roger Clemens admitted to using human growth hormone was a critical factor in a federal grand jury's decision to indict Clemens on charges he lied to Congress. "If it was just Roger versus [Brian] McNamee, it's a different matchup," former Rep. Tom Davis of Virgina said. "We didn't call Andy Pettitte, we deposed him, and he supported McNamee and that was a problem for [Clemens]," Davis added. "Without Pettitte, neither McNamee nor Clemens was that articulate or credible."