DO YOU THINK ROGER CLEMENS TOOK STEROIDS NOW?

DOES ANDY PETTITTE'S TESTIMONY SWAY YOU ON THIS ISSUE?

Roger Clemens told Yankees teammate Andy Pettitte nearly 10 years ago that he used human growth hormone, Pettitte said in a sworn affidavit to Congress, The Associated Press learned Tuesday.

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myFOXhouston.com will stream live video of Clemens' testimony on Capitol Hill beginning at 9 a.m. CST.

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Pettitte disclosed the conversation to the congressional committee holding Wednesday's hearing on drug use in baseball, a person familiar with the affidavit said. The person spoke to the AP on condition of anonymity because the document had not been made public.

According to the person familiar with the affidavit, who said it was signed Friday night, Pettitte also said Clemens backtracked when the subject of HGH came up again in conversation in 2005, before the same House committee held the first hearing on steroids in baseball.

Pettitte said in the affidavit that he asked Clemens in 2005 what he would do if asked about performance-enhancing substances, given his admission years earlier. According to the account told to the AP, the affidavit said Clemens responded by saying Pettitte misunderstood the previous exchange in 1999 or 2000 and that, in fact, Clemens had been talking about HGH use by his wife in the original conversation.

"We don't know what Andy said," Clemens' lead lawyer, Rusty Hardin, said in a statement e-mailed to the AP by his spokesman. "We look forward to hearing tomorrow."

The existence of the affidavit first was reported by The New York Times. The details of its contents were first reported by the AP.