Kathynmarissa became the 50th stakes winner worldwide for American Pharoah in Wednesday's $1.5-million Pepsi Dueling Grounds Oaks Invitational Stakes at Kentucky Downs. A close third in the Tepin Stakes at Churchill Downs June 29 and second after leading in the stretch in the GII Fasig-Tipton Saratoga Oaks Invitational Stakes Aug. 2, the Michael Caruso and Michael Dubb colorbearer was backed as the 5-2 favorite here. She was bumped at the start and raced in seventh through a half mile in :48.60. The $200,000 KEESEP yearling made a four-wide bid off...