Racing Photo Gallery

FILE - In this Dec. 5, 2010, file photo, champion racehorse Zenyatta stands in the winner's circle during Zenyatta Appreciation Day at Hollywood Park in Los Angeles. The former Horse of the Year foaled a dark bay colt shortly after 10 p.m. EST Thursday, March 8, 2012, at Lane's End Farm in Versailles, Ky., where Zenyatta has lived since retiring in November 2010. (AP Photo/Spencer Weiner, File)