If it wasn't obvious before, it should be now. Since appearing on the scene four-plus years ago, Sol Kumin's various racing partnerships--notably Head of Plains Partners, Madaket Stables, Monomoy Stables, and Sheep Pond Partners--have become ubiquitous on weekends and astonishingly successful at the highest levels. All told, the Kumin entities have won 38 Grade l races to date. This year has been particularly fruitful, with 10 individual winners of 16 Grade I races, including the Triple Crown, Kentucky Oaks, and Coaching Club American Oaks, with plenty of racing still to...