I asked Mr. Google in various ways, and he answered
Mr. Nelson Sánchez Ruiz was performing in 1951 for the Ringling Brothers and Barnum and Bailey Circus. He had been discovered by them the previous year in Havana, so we have to assume that he was Cuban and he was already performing before that date. This information comes from Billboard magazine:
A list of attractions of the Side Show from
this circus history:
Gilbert Reichert, Giant
Betty Broadbent, Tattooed Lady
Nelson Sanchez Ruiz, Top SpinnerFred Harris, Magic
Charles Barent, Seal Boy
Josephine Helbing, Snake Trainer
Irene Parry, Fat Lady
Singalee, Fireproof Man
Patricia Zerm, Sword Swallower
Charles Horrell, Escape Artist
Fred Harris, Punch and Judy
Freda Pnshnik, Armless and Legless Girl