Doug F. O'Neill (born May 24, 1968 in Dearborn, Michigan) is an American Thoroughbred horse trainer. In 1986 he began working in Thoroughbred horse racing as a stable hand and eventually a training assistant. In 1994 he obtained his professional trainer's license and since the early 2000s has been a major figure on the California racing scene. Wikipedia
The definitive Wikipedia entry for Doug O'Neill. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Doug_O%27Neill