Dr. Fager (April 6, 1964 – August 5, 1976) was an American thoroughbred racehorse who had what many consider one of the greatest single racing seasons by any horse in the history of the sport. In 1968 at the age of four, he became the only horse to ever hold four American titles in one year when he was named the Horse of the Year, champion handicap horse, champion sprinter, and co-champion grass horse. In his most famous performance, Dr. Fager set a world record of 1:321⁄5 for a mile in the Washington Park Handicap while carrying 134 pounds.