Sailor Vido was a male Human of 20th century Earth. He was a professional athlete who participated in boxing contests.

In 1930, he fought Killer Kanel in Bay Land Garden in San Francisco. Vido was the favorite. (DS9: "Past Tense, Part II")

This character was only mentioned in writing.
Sailor Vido replaced Gus Lloyd on the boxing poster, which first appeared in "The City on the Edge of Forever".