Best will play the boxing legend.
Joseph will play his rival, heavyweight champion Sonny Liston.
Aiyana White and Jeff Augustin also are executive producers.
Amin Joseph, Sonny ListonGetty Images
Co-executive producing is David Blackman for Polygram.
Joseph can currently be seen in Sony comedyOne Of Them Daysopposite Keke Palmer and SZA.
Hes perhaps known best for his role as the lead patriarch Jerome Saint in FXs hit seriesSnowfall.
