Billy Mack Ham (February 4, 1937 – June 20, 2016)[1] was an American music impresario, best known as the manager, producer, and image-maker for the blues-rock band ZZ Top.

[2] Ham also gained prominence in the country music world by discovering and managing multi-platinum singer-songwriter Clint Black.

"[3] In 1968, Ham was working as a record promoter for Bud Daily Distributing when he saw the Moving Sidewalks, the band that would become ZZ Top, perform at a Doors concert in Houston, and went backstage to compliment them.

Ham was instrumental to ZZ Top's success, co-writing songs, constructing their image, and producing every one of the group's albums from their debut through 1996's Rhythmeen.

His Lone Wolf Management produced such artists as Clint Black and Point Blank,[5] and songwriters signed to his Hamstein Music publishing company scored 100 Top 10 country singles, including 60 number ones.