Watch The Epic Trailer for 'The Kings'—Showtime's Docuseries About Boxing's Golden Age

For boxing fans unable to stomach Sunday's PPV farce between former pound-for-pound champ Floyd Mayweather and YouTube star Logan Paul, Showtime Sports Documentary Films is offering a scintillating alternative. Sunday, June 6 also marks the premiere of The Kings, a four-part docuseries chronicling the lives and careers of "Sugar" Ray...