Lance Armstrong says he is done with competitive racing.
"I can't say I have any regrets. It's been an excellent ride. I really thought I was going to win another tour," Armstrong said about his comeback attempt in 2009, four years after his first retirement. "Then I lined up like everybody else and wound up third.
The retirement ends his quest for an eighth title, but will not quell talk that he used performance-enhancing drugs. A federal investigation into the sport was launched after accusations by former teammate and disgraced 2006 tour champion Floyd Landis that Armstrong used drugs and taught other riders how to beat testing. The probe is ongoing.
"I can't control what goes on in regards to the investigation. That's why I hire people to help me with that. I try not to let it bother me and just keep rolling right along. I know what I know," Armstrong said. "I know what I do and I know what I did. That's not going to change."