''Russell Sullivan has given Rocky his fiftieth win.'' Bert Randolph Sugar, author of 100 Years of Boxing ''[I]n the early '90s, Marciano started slipping from our short long-term memory. Enter his poet, Russell Sullivan ... Sullivan's book is not just a perfect paean to a pugilistic hero but also to a history of mid-century America as glimpsed from the corner window of what was then America's second most popular sport, professional boxing.'' Los Angeles Times ''Russell Sullivan's revealing new biography ... will refresh those of a certain age about a boxing legend and initiate others into the full, entertaining story.'' Chicago Tribune ''[T]he definitive Marciano biography.'' Booklist ''When most boxing fans argue about the best heavyweight champions, they will continue to think of Louis, Ali, Dempsey, and Johnson. But they might consider putting Rocky Marciano up there on that level if they read Russell Sullivan's book.'' New York Times Book Review