Cássio (footballer, born January 1980)
Brazilian footballer and manager
Cássio José de Abreu Oliveira (born 8 January 1980), simply known as Cássio, is a former Brazilian-born Australian professional football player who last played for Adelaide United in the A-League.
Biography
Cássio began playing as a left back with local side Flamengo. After missing a penalty kick in the 2001 Copa Mercosur final, his career with Flamengo was effectively over and he was loaned to Internacional and Mexican Primera División side Atlas in 2002 and 2003. While at Internacional, Cássio won the 2002 Campeonato Gaúcho and scored the club's 1000th goal in Brazilian competitions. He played in Série B with Marília during the first half of 2004, before joining Primera División Paraguaya side Olimpia in July 2004. He had a brief spell with the New England Revolution, making only three appearances before being released midway through the 2005 season.
Cassio's arrival at Adelaide United came after all of the club's options at left-back (Matthew Kemp, Adam van Dommele and Aaron Goulding) were either released or transferred at the end of the 2006–07 A-League season. Although failing to score during his debut A-League campaign, his 3 assists, and contribution of 14 shots on target, revealed how dangerous Cassio was as an attacking force. For his significant contributions on the field for the 2007–08 season, he was given three end of season awards, including the Club Champion award.
Despite a slow start to the 2008–2009 A-League season due to injury, Cassio proved just how valuable he had become to the club when he set up all three of Adelaide United's goals against FC Bunyodkor in the first leg semi-final of the 2008 AFC Champions League.
The public source identifies “Cássio (footballer, born January 1980)” as brazilian footballer and manager. This brief keeps that definition visible, then builds a research path around Cássio, footballer and born.
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The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated Mar 13, 2026. The linked authority identifier is Q436821. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1980, 2001, 2002 and 2003.
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This entry incorporates text from “Cássio (footballer, born January 1980)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.