LOUISVILLE, Ky. - R Heat Lightning, the probable favorite for the 137th Kentucky Oaks at Churchill Downs on Friday, was declared from the race Monday morning after being diagnosed with a possible knee injury, said trainer Todd Pletcher.
"We detected heat in her right knee this morning and she was slightly off at the jog," said Pletcher. "It's unfortunate. She's a very talented filly and has been training great."