Conversation so far:
John Morrison appeared on what show in 2009?
On April 15, John Morrison returned to the WWE SmackDown brand as part of the 2009 Supplemental Draft.
When was John Randall Hennigan born?
John Morrison was born October 3, 1979.
IN 2016 John Morrison appeared on ESPN to promote what?
In 2016, Hennigan, Rey Mysterio, and King Cuerno appeared on ESPN to promote the second season of Lucha Underground.

Question: Best known for tenure in what sport?
Self-contained rewrite: John Morrison is best known for tenure in what sport?