Sports Illustrated's Chris Mannix sits down with six cast members of Prime Video's The Greatest, the first authorized scripted series about Muhammad Ali, for an exclusive roundtable exploring the life, legacy and untold stories of one of the most iconic athletes in history. Jaalen Best (Muhammad Ali), Omari Hardwick (Cassius Clay Sr.), Giovanni Ribisi (Angelo Dundee), Dana Gourrier (Odessa Clay), Kai Parham (Rudy Clay) and Amin Joseph (Sonny Liston) discuss the extraordinary preparation, emotional challenges and personal connections that went into bringing Ali's story to the screen.