Most versatile Hollywood "sports" star

Susan Clark playing Babe Didrikson Zaharias. She got an Emmy and a husband and a successful TV series from it.

With the recent addition of an edit feature, ETA means “edited to add” around here.

ETA= edited to add.

How about “ETA = ETA’s The Acronym”?

Will Ferrell has already played an ice skater, and a race car driver, and a soccer coach, and he’s playing a basketball player in a movie coming up.

Snoopy?

Only insofar as he provided physical, logistical, and moral support to his recently-blinded figure-skating girlfriend as she prepared for a comeback performance that wasn’t really related to the Olympics at all. His character had been playing minor league hockey.