On Sunday afternoon at Saratoga Race Course, Michael Dubb stood in the winner’s circle. He’d just watched his 3-year-old filly Monomoy Girl, owned in partnership with Monomoy Stables, The Elkstone Group, and Bethlehem Stables, impressively win the Grade 1 Coaching Club American Oaks, his fourth Grade 1 Saratoga win, the first three coming in the Spinaway.