Yuki Kawauchi, The World's Most Famous Amateur Runner, Explains Why He's Finally Going Pro

As soon as they’d had a chance to mop the sweat or rinse the vomit out of their mouth, the top finishers of the Chicago Marathon stiffly climbed to the stage in the media center to answer reporters’ questions that generally elicited thanks to the Chicago Marathon for putting on such a great race and magnanimous credit…