Wikipedia:Articles for deletion/Cassius Marcellus Clay Sr.
The subject passes  as there's plenty of detailed biographical source material out there such as https://books.google.co.uk/books?id=t0Jk5oK30HAC&pg=PA15 this.  It is interesting to learn from this that Clay Senior had the slogan "I am the greatest" before his son
— user:Andrew, 17:19, 7 June 2016 (UTC)
Stance: keep
Cited policy: WP:BASIC (Wikipedia:Notability)