Grand Slam of Grass

The Grand Slam of Grass is a series of American Thoroughbred horse races made up of four turf events for three-year-old horses. 
The series offers a $5 million bonus for any horse who wins all four races. Currently sponsored by Jacobs Investments, the series consists of:
Paddy O'Prado has come the closest to winning the Grand Slam. In 2010, he won the Colonial Turf Cup, Virginia Derby, and Secretariat, but did not run in the Breeders' Cup Turf.