Beginnings in Argentina Ortega began his professional football career in 1991 with Argentine club
River Plate. With the club, he won the
Primera División in 1991, 1993, 1994 and 1996, as well as the
Copa Libertadores in 1996. He lost out on the
1996 Intercontinental Cup final to
Juventus.
Europe Ortega left Argentina in 1996. He played seasons for
Valencia before being signed by Sampdoria in 1998 for 23 billion
Italian lire (£8 million), replacing
Juan Sebastián Verón. After the club was relegated to Serie B, Ortega joined
Parma, rejoining national and former club teammate
Hernán Crespo, replacing Verón again who left for Lazio. Parma paid Sampdoria 28 billion lire (£9.4 million). However, in the following season he returned to Argentina with
River Plate, to compensate the unpaid 12 billion lire transfer fees of Crespo (the 10% of the transfer fees to Lazio).
Claudio Husaín also joined the club. River Plate acquired 50% registration rights of Ortega for a reported 5.5 million dollars. While, in Parma annual filing to Italian government, Ortega was sold for eleven billion lire.
Fenerbahçe and ban In May 2002, Fenerbahçe signed Ortega from River Plate for a fee of US$7,500,000 (US$2,500,000 of which was paid to Parma). Fenerbahçe also bought his image rights for a further US$1,500,000. Ortega signed a 4-year contract. He was one of the key players of the team, scoring 5 goals in 14 matches. Fenerbahçe were forced to file a complaint to FIFA in April 2003 as Ortega had failed to return from international duty since 12 February 2003. After some controversy and rumours in the winter window of Argentine market, he was loaned to Nacional B side
Independiente Rivadavia, signing a one-year contract where a twice a week trip to a Chilean Special Treatment Center for alcoholics is one of the clauses. On 1 May 2009 he was let go by Independiente officials. The club decided to terminate his contract in advance. Ortega was on loan from River Plate. On his first game back in River Plate, 25 July 2009, he scored an outstanding chip shot goal to give River a 1–0 victory over
Everton of England in Edmonton, Canada during the pre-season. In the 2009 Apertura, Ortega scored a wonder lobbed goal against Chacarita Juniors to give River Plate a 4–3 victory. Later in the tournament, he scored a last minute equalizer against Estudiantes. In the 2010 Clausura, Ortega started River's first two matches, but suffered another alcoholic relapse and missed the next ten games before returning against Newell's Old Boys in the 13th round of matches. In 2011, he was loaned to Defensores de Belgrano. On 8 April 2012,
Fox Sports Argentina journalist Juan José Buscalia, confirmed that Ortega would join
Chilean Primera División club
Unión San Felipe in June 2012. ==International career==