Ernesto Mascheroni was a footballer

Football (soccer)

Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball...

 from Uruguay

Uruguay

Uruguay ,officially the Oriental Republic of Uruguay,sometimes the Eastern Republic of Uruguay; ) is a country in the southeastern part of South America. It is home to some 3.5 million people, of whom 1.8 million live in the capital Montevideo and its metropolitan area...

. His position was defender

Defender (football)

Within the sport of association football, a defender is an outfield player whose primary role is to prevent the opposition from attacking....

. He played as a left-back.
He was born in Montevideo

Montevideo

Montevideo is the largest city, the capital, and the chief port of Uruguay. The settlement was established in 1726 by Bruno Mauricio de Zabala, as a strategic move amidst a Spanish-Portuguese dispute over the platine region, and as a counter to the Portuguese colony at Colonia del Sacramento...

.

He played 12 times for the Uruguay

Uruguay national football team

The Uruguayan national football team represents Uruguay in international association football and is controlled by the Uruguayan Football Association, the governing body for football in Uruguay. The current head coach is Óscar Tabárez...

 between 1930 and 1939, including in the 1930 FIFA World Cup

1930 FIFA World Cup

The 1930 FIFA World Cup was the inaugural FIFA World Cup, the world championship for men's national association football teams. It took place in Uruguay from 13 July to 30 July 1930...

 where Uruguay won the first ever World Cup tournament. In 1934, he moved to Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 to play for Ambrosiana

F.C. Internazionale Milano

Football Club Internazionale Milano, often referred to as Internazionale or simply Inter, is a professional Italian football club based in Milan, Italy. Outside Italy, the club is often called Inter Milan. They are the reigning FIFA Club World champions and Coppa Italia holders.Inter have always...

 (now Inter Milan) until 1936. During this period, he represented the Italy national football team

Italy national football team

The Italy National Football Team , represents Italy in association football and is controlled by the Italian Football Federation , the governing body for football in Italy. Italy is the second most successful national team in the history of the World Cup having won four titles , just one fewer than...

 twice, when the nationality rules were less strict than they now are. He later returned to Uruguay to play for C.A. Peñarol

C.A. Peñarol

Club Atlético Peñarol also known as Carboneros, Aurinegros and familiarly as Manya, is an Uruguayan sports club based in the Peñarol barrio, Montevideo, best known for its professional football team. The team plays their home matches in Estadio Centenario, the largest stadium in the country, but...

from 1936 to 1940.

By the time of his death in July 1984, at the age of 76, he was the last surviving member of Uruguay's 1930 World Cup winning team; though it would be another 26 years before the death of the last surviving participant of that World Cup.