Congreve raced over four seasons, from ages 3 to 6.[3] During this time, he started 18 times for 11 wins and 5 places with winnings of 247,571 pesos.[1] Winner of the Gran Premio Polla de Potrillos and Gran Premio Carlos Pellegrini, he was considered one of the best racehorses of his generation, despite soundness issues after an injury at the age of three.[2]
The Haras Ojo de Agua stud in Argentina already had a good broodmare band when it purchased Congreve for stud duties.[1] In his first few seasons at stud, Congreve was not bred to high class mares. Despite this, he quickly proved to be an excellent sire.[4]
Congreve was the leading sire in Argentine on seven occasions (1937, 1939-1941, 1943-1945), ranked twice second (1935, 1942), third once (1936), and seventh once (1938). He was also ranked sixth on the United States sire list in 1939. Congreve headed the Argentine broodmare sire list five times (1948, 1949, 1951-1953).[4]
During his stud career, he sired 177 winners, including at least 40 stakes winners,[4] of nearly 600 races with total stakes earnings of over 5,567,992 pesos.[1] Congreve is considered an Intermediate chef-de-race in the Roman-Miller dosage system.[4]
Churrinche, 1944 Argentinian Champion Three-Year-Old Colt, winner of the 1944 Gran Premio Nacional and 1945 and 1946 Gran Premio de Honor, second on Argentinian general sire list in 1956 and third in 1955
Dalilah, winner of the 1939 Gran Premio Polla de Potrancas and Gran Premio Selección
Embrujo, Argentinian Triple Crown winner, 1939 Argentinian Champion Three-Year-Old Colt, winner of the 1939 Gran Premo Polla de Potrillos, Gran Premio Jockey Club, Gran Premio Nacional, and 1940 Gran Premio General Pueyrredón, second on Argentine general sire list in 1951 and 1953, second on Argentine broodmare sire list in 1961 and 1965[5]
Ix, 1935 Argentinian Champion Three-Year-Old Colt, winner of the 1935 Gran Premio Jockey Club, Gran Premio Nacional, and Gran Premio Carlos Pellegrini
Judea, winner of the 1940 Gran Premio Selección, Gran Premio 25 de Mayo, and Gran Premio San Isidro
La Mission, Argentinian Quadruple Crown winner, 1940 Argentinian Champion Three-Year-Old Filly, winner of the 1940 Gran Premio Polla de Potrancas, Gran Premio Jockey Club, Gran Premio Nacional, Gran Premio Carlos Pellegrini, and Gran Premio Jorge de Atucha
Medicis, 1936 Argentinian Champion Three-Year-Old Colt, winner of the 1936 Gran Premio Polla de Potrillos, Gran Premio Jockey Club, and Gran Premio Montevideo
Congreve's progeny include eight Argentinian champions, six winners of the Gran Premio Nacional, four winners of the Gran Premio Polla de Potrancas, four winners of the Gran Premio Jockey Club, three winners of the Gran Premio Polla de Potrillos, three winners of the Gran Premio Selección, and two winners of the Gran Premio Carlos Pellegrini.[1]
Académico, Argentine Champion Three-Year-Old, Argentine Champion Older Horse, winner of the Gran Premio Carlos Pellegrini (twice), Gran Premio de Honor, Gran Premio José Pedro Ramírez, etc.
La Rubia, Argentine Champion Older Mare, winner of the Gran Premio 25 de Mayo, Gran Premio Enrique Acebal, etc.
Gualicho, Brazilian Champion Three-Year-Old, Brazilian Champion Older Horse, winner of the Grande Prêmio Brasil, etc.