Without Ray Arcel (1899-1994), the world of boxing during the 20th century would have been markedly different. Indeed, the credibility professional boxing as a sport would have been greatly lessened. Arcel's prominence is all the more interesting because he made his mark not as a fighter, promoter, or manager, but as a trainer. From Benny Leonard to Roberto Duran and Larry Holmes, Arcel stood in the corner for champions of every weight division that existed in his lifetime, a record that remains unprecedented. This biography chronicles Arcel's life inside the ring, and out--where he remained a highly secretive man and maintained ambiguous relationships with some of the chief mob figures of his day. Through a wealth of information from Arcel's unpublished memoir, this work offers an extraordinary portrait of one of boxing's most influential and enigmatic figures.