Édgar Osvaldo Barreto Cáceres (born 15 July 1984) is a Paraguayan former professional footballer who played as a central midfielder.

He made over 260 appearances in the competition, in service of Reggina, Atalanta, Palermo and Sampdoria, and retiring in 2022 after two seasons back in the Netherlands at NEC.

[3] He played an integral part in keeping Reggina in Serie A at the end of the 2007–08 season, earning a reputation for scoring long range goals.

[9] During an interview in July 2017, Barreto affirmed that he would not return to Paraguayan football due to family reasons, although he recognized that his time at Cerro Porteño was fundamental for his career.

[14] On 15 July 2020, on his 36th birthday and after 13 years in Italian football,[15] Barreto returned to his first European club NEC in the Dutch second tier.

[22] On 4 August, before the Summer Olympics began, he played in a preparation game against the Portugal of Cristiano Ronaldo in the city of Algarve, resulting in a 5–0 defeat.

[23] On 17 August 2005, Barreto scored his first international goal to open a 3–0 friendly win over El Salvador in Ciudad del Este.

[26] At the 2010 FIFA World Cup in South Africa, he came on in the 75th minute against Japan in the last 16 and scored the first attempt in the penalty shootout, as Paraguay advanced to the next round for the first time.