Actually.........
That's not the right quote.....
It's:
“Auto racing, bull fighting, and mountain climbing are the only real sports ... all others are games.”
-Ernest Hemingway
FWIW the quote "There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games" is generally attributed to Hemingway... however it may have originated with Barnaby Conrad or Ken Purdy, a writer who wrote a character named Helmut Ovden, modeled on Hemingway.
Thanks, Cliff Claven!