After seven deaths raised questions about the future of horse racing, Mage earned a surprising Kentucky Derby triumph on Saturday, capping a nerve-rattling day that included two more fatalities ahead of the 149th edition of the world’s most famous race. Mage, a 15-1 shot, had only one victory in his career, giving little indication that he could triumph versus 17 rivals in a race that is not kind to the inexperienced. Still, he made a gutsy stretch run, overtaking Two Phil’s to his inside and winning by a length. Mage, who didn’t race as a two-year-old, ran 1 1/4 miles […]