I believe three people transcend their sport; they are more than the "Goats"; they are cultural icons:
Wayne Gretzky
Michael Jordon
Babe Ruth
People from all walks of life know these three. Their participation elevated their sport. There are innumerable great athletes with phenomenal accomplishments, but the people above were known far beyond the court/field.
Who else might you nominate for this Transendence category? Brady, Tiger Woods, Richars Petty, Michael Phelps, ? ? ?