I don't know the answer* but here's a mildly interesting factlet:
"Fantasy football leagues, as we know them today, emerged in the early 1960s. Specifically, the first fantasy football league, the Greater Oakland Professional Pigskin Prognosticators League (GOPPPL), was created in 1962 by Bill Winkenbach and a group of friends. The first draft for this league took place in August 1963."
* the answer is google, obvs.