David and JoAnn Hayden's Dark Hollow Farm came away victorious in three of the four classes at the 90th annual Maryland Horse Breeders Association's Yearling Show held Sunday at the Maryland State Fairgrounds in Timonium. Dark Hollow Farm's colt by The Factor, co-bred and owned with Ellen Charles of Hillwood Stable, was awarded the grand champion trophy by this year's judge, longtime bloodstock agent Rick Abbot. The Haydens have now won 19 classes (solely or in partnership), since 1989 with grand champions in 2009 and 2014. A total of 59...