Thomas Rutherford McCarthy (November 30, 1933 – July 21, 2016) was an American thoroughbred racehorse owner and trainer from Louisville, Kentucky, best known for the 2009 Blue Grass Stakes winner and Kentucky Derby runner, General Quarters. From a racing family, his grandfather was a jockey in Ireland and both his father and uncle trained horses at racetracks in New England. McCarthy died on July 21, 2016 in Louisville, Kentucky due to melanoma.