His 13 birdies and an eagle on a par-70 course in Longview, Texas on August 19, 1962 earned him the nickname "Mr.
The 55 shot round is still the lowest official golf score on record for course of regular par.
Blancas spent the last 16 years of his regular career as club pro at Randolph Park in Tucson.
He has 18 holes-in-one during his career, is a member of the Texas Golf Hall of Fame, and lives in Houston.
PGA Tour playoff record (1–1) Note: Blancas never played in The Open Championship.