Ruffian (April 17, 1972- July 7, 1975) Voted top female racehorse of the 20th century. Her legend has earned her a place in the U.S Racing Hall of Fame. She remained undefeated until her 11th race when she injured herself in a match race against top colt (male horse) of the year, &quot;Foolish Pleasure&quot;. She broke her sesamoid bones in her leg, but stubbornly refused her jockey&#x27;s attempts to stop her on the track. She ran for another 100 yards, determined to win.