Mariano Aguerre, (born May 25, 1969 in Buenos Aires) is a professional polo player in Argentina and the United States.

He is a nine-time winner of the Argentine Open at Palermo, winning with three different teams: Ellerstina, Chapa I and La Dolfina.

According to Horace A. Laffaye's book "Polo in Argentina," Gonzalo told the author at the time, "that kid is going to be a 10-goal player."

[6] [7] [8] Mariano won the “Argentine Triple Crown” with Ellerstina in 1994 with teammates Adolfo Cambiaso, Gonzalo Pieres, Sr. and Carlos Gracida.

[9] [10] Mariano runs Los Machitos with professional polo players, Nick Manifold and Naco Taverna.

A bay gelding foaled in 1996, Califa was a durable war horse played by Mariano in many memorable contests.