At six feet, four inches and more than 220 pounds, Roger Clemens (1962- ) was a major figure in baseball for nearly a quarter century. The best pitcher of his generation, his 4,672 strikeouts rank third all-time. He dominates modern statistical analysis. High strung and temperamental, Clemens got into a barroom brawl during his first semester at University of Texas and once was jailed for punching out a Houston police officer. He endured sports writers heckling his inarticulate English and hostile fans decrying his aggressive pitching style. He retired in 2007 at 45 amid allegations...