Carlos Riolfo and the 1930 World Cup
Carlos Riolfo belonged to Uruguay’s 22-player squad at the inaugural FIFA World Cup in 1930. He was in the squad but did not appear in a match. FIFA lists Peñarol as his club at the time of the tournament. This is a tournament affiliation, not a claim that Peñarol was his only club during his career.

Tournament record
He was one of the seven members of Uruguay’s squad who did not take the field in the four-match campaign. No goals are credited to him in FIFA’s Uruguay 1930 scoring table.

Historical context
Uruguay arrived as Olympic champions and hosted the inaugural edition in Montevideo. The team defeated Peru, Romania, Yugoslavia and Argentina to claim the title. The squad was coached by Alberto Suppici and captained by José Nasazzi. Detailed career chronology and biographical claims outside the 1930 tournament require additional club and archival sources; this profile deliberately avoids guessing those details.