What is J.B. Smoove's net worth? J.B. Smoove is an American comedian and actor who has a net worth of $6 million. Thanks to his breakout role as Leon Black on Larry David's long-running HBO sitcom Curb Your Enthusiasm, Smoove has become a highly sought-after comedian with roles in a variety of feature films and television shows as well as stand-up comedy projects, but in fact he's been a known...