After the war he worked with Zutty Singleton and Albert Nicholas. He became an English professor at Kentucky Wesleyan College and the University of South Florida. On the side, he played piano with Tony Parenti, Omer Simeon, and Doc Evans. He recorded solo albums for Euphonic, GHB, Jazzology, London, Paradox, and Texstar. For Audiophile, he recorded ragtime pieces by Scott Joplin.
- Old Blues (Audiophile, 1958)
- The Complete Piano Works of Scott Joplin (Solo Art, 1960)
- The Complete Works of James Scott (Audiophile, 1962)
- Eight on Eighty Eight (Euphonic, 1977)
- Knocky Parker and His Cakewalking Jazz Band (GHB, 1981)
- The Complete Piano Works of Jelly Roll Morton (Solo Art, 1995)
- From Cakewalk to Ragtime to Ballroom (Solo Art, 2010)
- In Gay Old New Orleans with Dick Wellstood (GHB)
- Porterfield, Nolan (2004). Exploring Roots Music: Twenty Years of the JEMF Quarterly. Scarecrow Press. pp. 86–. ISBN 978-0-8108-4893-1. Retrieved 9 October 2018.
- Yanow, Scott. "Knocky Parker". AllMusic. Retrieved 9 October 2018.
- ""Professor/pianist John "Knocky" Parker" by University of South Florida". scholarcommons.usf.edu. Retrieved 9 October 2018.
- Broer, Lawrence R.; Walther, John Daniel (1990). Dancing Fools and Weary Blues: The Great Escape of the Twenties. Popular Press. pp. 140–. ISBN 978-0-87972-458-0. Retrieved 9 October 2018.
- Hunt, Dennis (10 January 1986). "'We Are The World' Scores In Grammy Nominations". Los Angeles Times. Retrieved 9 October 2018.
- "Knocky Parker". GRAMMY.com. 22 May 2018. Retrieved 9 October 2018.
- "Knocky Parker | Album Discography | AllMusic". AllMusic. Retrieved 9 October 2018.