 They dominated racing in that state during the 1960s and 1970s and helped modernize flat racing training.Richard Dutrow Sr. began training race horses in the 1950s.Living in Hagerstown, Maryland, where his son Richard Jr. was born in 1959, his success at the small half-mile track in his hometown plus at others in such places as Bel Air, Upper Marlboro and Cumberland as well as at Waterford Park in Chester, West Virginia led to his moving to the larger tracks on the Maryland racing circuit.