He is the best sports handicapper in the history of Las Vegas. He used to be called "Las Vegas King", "Guru", or something that he surely is: a genius. He inaugurated the first sports and race book, at Stardust Hotel & Casino. Every casino in Las Vegas copied his invention afterwards. He used to run four casinos at the same time, during the 1970's and early 1980's: Stardust, Fremont, Hacienda, and Marina.

Frank "Lefty" Rosenthal inspired one of the leading characters in the "Casino" book and movie (performed by Robert de Niro), though the story doesn't speak the entire truth, he says. You can find Frank at his own web page.