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Aaron Craft #4 of the Ohio State Buckeyes reacts after losing to the Dayton Flyers 60-59 in the second round of the 2014 NCAA Men's Basketball Tournament at the First Niagara Center on March 20, 2014 in Buffalo, New York. - 

Much was made (here and elsewhere) of the billion dollar bracket challenge from Warren Buffett and the founder of Quicken .

Thanks to the wonders of, you know, actually playing the game, it looks like the billion dollars is safe.

No spoilers here, but after the second round of games, ESPN said just 5.7 percent of its 11 million brackets are still any good.

Follow Kai Ryssdal at @kairyssdal