Frank "Son" Seals (August 14, 1942 – December 20, 2004)[2] was an American electric blues guitarist and singer.

He played there with prominent blues musicians, including Albert King, Rufus Thomas, Bobby Bland, Junior Parker, and Rosco Gordon.

[8] His career took off after he was discovered by Bruce Iglauer of Alligator Records at the Flamingo Club on Chicago's South Side.

Vachss gave Seals several cameo appearances in his novels,[11] and co-wrote songs with him for his album Lettin' Go, released in 2000.

[15] After his health began to decline, Seals toured with accompaniment by several different bands, including those of James Soleberg, Jimmy Vivino, and Big Jim Kohler.

The band Phish performed Seals's song "Funky Bitch" and brought him on stage on several occasions.