Bartolome “Barto” Castagnola is an Argentine polo player born December 5, 2000, who reached the 10-goal handicap at age 20, joining a group of players you can count on one hand who have achieved polo’s maximum rating before turning 21. Born December 5, 2000 in Argentina, Barto is the older of the two Castagnola brothers who form the backbone of La Natividad, and he has already won the Argentine Open and the Triple Crown. If his younger brother Camilo is the explosive one, Barto is the architect: the player who provides structural foundation, reads defensive patterns, and creates the space that allows the attack to function.
The partnership between the Castagnola brothers is one of the great sibling stories in modern sport. They have played together since childhood, moving from junior polo through medium-goal and into the 40-goal level with an understanding that cannot be replicated by assembling strangers. They anticipate each other’s runs, cover each other’s weaknesses, and play with a rhythm that comes from sharing a field for their entire lives. At La Natividad, that instinctive partnership is the engine around which everything else is built.
For the 2026 Argentine Triple Crown, Barto plays for La Natividad La Dolfina alongside Camilo, Adolfo Cambiaso, and Poroto Cambiaso. The combination of two sets of brothers, including a father-son pair within one of those sets, gives La Natividad La Dolfina a chemistry that assembled teams struggle to match. They compete in the Hurlingham Open, the Tortugas Open, and the Argentine Open at the Campo Argentino de Polo in Buenos Aires. The 40-goal rating, the maximum possible, means every match is played at the highest level the sport offers.
In the American season, Barto competes for Audi at the USPA National Polo Center in Wellington, Florida, playing through the C.V. Whitney Cup, USPA Gold Cup, and U.S. Open. At 25 in 2026, Barto is entering what should be the prime years of a career that has already produced more titles than most players accumulate in a lifetime. The ceiling, given his current trajectory and the family programme behind him, is very high indeed.