WASHINGTON — Roger Clemens was vehement: “Let me be clear. I have never taken steroids or HGH,” he told a House committee in 2008. Now, instead of the Hall of Fame, baseball’s seven-time Cy Young winner could go to prison after being indicted by a federal grand jury Thursday for allegedly lying to Congress.

The case writes a new chapter in one of baseball’s worst scandals, the rampant use of performance-enhancing drugs in the 1990s and early 2000s, and leaves Clemens’ legacy in jeopardy.

The six-count indictment alleges that Clemens obstructed a congressional inquiry with 15 different statements made under oath, including denials that he had ever used steroids or human growth hormone.

Former Rep. Tom Davis of Virginia, the top Republican on the House panel at the time of Clemens’ testimony, called it “a self-inflicted wound.”

Clemens had been prominently mentioned in the Mitchell Report, Major League Baseball’s own accounting of its steroid problem, and he went to Capitol Hill on his own to clear his name.

“Clemens was not under subpoena. He came voluntarily,” Davis said. “And I sat there in the office with (committee chairman) Henry Waxman and said, ’Whatever you do, don’t lie.”’

Clemens was sticking to his story Thursday. He insisted he was telling the truth, again denying any wrongdoing on or off the field.

“Roger is looking forward to his day in court,” Clemens lawyer Rusty Hardin told a news conference. “He is happy this has finally happened. We have known for some time this was going to happen. We’ll let everything get taken care of in court.”