1. One horse sired offspring that won 50% of all U.S. throroughbred horse races between 1865 and 1880. Who was he?

Lexington

2. The Louisville Jockey Club, which created and sanctioned the KY Derby, was formed in what year, and founded by whom?

June 1874 by Col. Merriwether Louis Clark

3. Who was the first Triple Crown winner, and when?

Sir Barton 1919