It may have seemed a foregone conclusion when he hit the line a decisive winner of the Breeders' Cup Classic, and it proved to be so. Authentic arrived to take up stud duty at Spendthrift Farm on Monday after the Breeders' Cup. We talk to Bob Baffert and Ned Toffey about the new stallion. Kentucky Derby and Breeders' Cup Classic winner Authentic (Into Mischief-Flawless, by Mr. Greeley) has been retired to Spendthrift Farm, where he will stand for a fee of $75,000 S&N, the farm announced Monday morning, two days...