The greatest pitcher of all-time? Or baseball's greatest disappointment? We always thought Roger Clemens was a dominant player into his 40s because, well, he just wanted it more than everyone else. But did Clemens' competitive juices drive him to juice? The Mitchell Report says Clemens used steroids, a charge he has vehmently denied. On Feb. 13, he will get a chance to clear his name, under oath, in front of Congress.