CHP Racing's Rhiannon (Medaglia d'Oro) marked her first race back following a seven-month respite with an emphatic four-length score in a Big A optional claimer Friday. Setting a course record of 1:45.60 for nine panels in the process, the 5-year-old mare may her next start in the GI Dunkin' Diana Stakes at Saratoga July 12, according to owner Phil Hatfield, who operates CHP Racing with his wife Christine. "That's what everybody is talking about, and we hope that happens," Hatfield said. Trainer Chad Brown, who conditions the mare, has won...