Prove Out to the eventual 1973 Horse of the Year. 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. In addition to his two memorable victories in 1973, Prove Out also ran track record times at Saratoga for 7 furlongs (1:21), and at Belmont Park for 1 miles (1:40). His Woodward Stakes time of 2:25 for 1 miles on an off track is the second fastest performance ever recorded for that distance at Belmont Park, behind only Secretariat's 2:24 record Belmont Stakes win. Prove Out's
Dunkirk (American horse) also at Gulfstream Park. He then placed second in the Florida Derby, a race in which victorious Quality Road set a new track record. In the 2009 Kentucky Derby, Dunkirk finished 11th after stumbling badly at the beginning. This was the first time he had failed to finish in the top two. He then skipped the mid-May Preakness Stakes and aimed for the Belmont Stakes in early June at Belmont Park. After setting a fast pace for the first 6 furlongs, Dunkirk was overtaken in the stretch but fought back to finish 2nd behind eventual 3-year old champion Summer Bird,