She’s a long shot, but Dave Portnoy is happy to have a horse in the race. The Barstool Sports founder’s filly, No. 15 Lovely Grey, is officially in the gate for Friday’s Kentucky Oaks, sliding into the $1.5 million Grade 1 race after a late scratch shook up the field. The door opened when Bottle of Rouge — one of the race’s more accomplished contenders — was withdrawn after developing a cough following a weekend workout at Churchill Downs. Lovely Grey was previously stuck on the also-eligible