Prove Out

Prove Out (1969–1990) was an American thoroughbred racehorse best known for his wins over Secretariat in the 1973 Woodward Stakes, and Riva Ridge in the 1973 Jockey Club Gold Cup.

[2] In the 1973 Woodward, Prove Out, at odds of 16:1, upset odds-on favorite Triple Crown champion Secretariat by 41⁄2 lengths, while conceding 7 pounds to the eventual 1973 Horse of the Year.

[3] Prove Out also defeated Secretariat's stablemate, the 1972 Kentucky Derby winner and 1973 U.S. Champion Older Horse Riva Ridge, in the 1973 Jockey Club Gold Cup.

[1] Prove Out's winning performance in the 2 mile Jockey Club Gold Cup was timed in 3:20, bettered in American racing only by the great Kelso.

In a span of two months Prove Out decisively defeated four Hall of Fame horses: Forego, Secretariat, Cougar II, and Riva Ridge.