The 1980 Derby winner died about 7:30 a.m. at the advanced age of 31 after eating a hearty breakfast and being turned out in her paddock, said Cindy Perry, an office administrator at the farm. Perry said Genuine Risk had not been ill.

She was the oldest living Derby winner and the only filly to finish in the top three in each of the Triple Crown races. She was second in the Preakness and the Belmont Stakes.

"Genuine Risk was an amazing horse with tremendous heart that lived a life befitting a champion," owners Bertram and Diane Firestone said in a statement issued by the farm.

It was in the 1980 Derby where Genuine Risk made history, taking a commanding lead in the stretch of the 106th Derby and outrunning Rumbo and Jaklin Klugman for the victory. She paid $26.80 to win and immediately became one of the top fillies in racing history.

Manzi breaks clavicle. Driver Catello Manzi, injured in a multi-horse spill at Harrah's Chester on Sunday, remains hospitalized at Crozer-Chester Medical Center with a broken clavicle and fractured ribs, according to his wife, Ellen.

Manzi, driving Philos Hanover, was dislodged from the sulky while trying to avoid the fallen Fake Denario in the 12th race.

Eric Goodell, the driver of Fake Denario, also was taken to Crozer-Chester and was released that night.