More often than not, when the horses hit the finish line for the last Breeders' Cup race of the day, we know who the Horse of the Year is. Usually, someone has done enough to separate themselves from the pack: Flightline (Tapit), Knicks Go (Paynter), Authentic (Into Mischief). Or no one stepped up to unseat the leading contender going in. We have nothing of the kind this year. There were plenty of standout performances on Breeders' Cup Day, but that's part of the problem. The leading contenders are so evenly...