Jonas Gonçalves Oliveira, also known as Jonas (born April 1, 1984 in Bebedouro), is a Brazilian forward. Jonas can also play as a striker, winger and a attacking midfielder. He currently plays for Valencia CF of Spain.

Guarani

Jonas started his career at Guarani in 2005. He made his debut against Esporte Clube Santo André. While playing for Guarani, Jonas scored 12 goals in 25 matches.

Santos

In 2006, Jonas transferred to Brazilian champions Santos, where he won the 2006 Campeonato Paulista scoring five goals in six matches. However, he had a serious knee injury that kept him out of action for six months.

In 2007 he returned to the pitch and scored four gosl in the Paulista, helping Santos won the tournament for the second time in a row. After spending only one year at Santos, Jonas transferred to Grêmio in 2007.

Grêmio

On September 12, 2007, Grêmio signed a four-year deal which transferred 50% of Jonas' rights to Grêmio for $.5 million. He made his debut in the Gre–Nal derby, leaving injured early in the second half.

After the arrival of more forwards in 2008, Jonas lost his place, sometimes even failing to make the reserves list. The most consistent criticism from the press was his lack of physical strength when playing up front against powerful defenders. By July Jonas decided to leave the club.

Portuguesa (loan)

Despite not being able to avoid relegation to Série B, Jonas was one of the best players in the team, scoring 18 goals during his stay, nine in the Campeonato Brasileiro, ahead of teammate Edno's eight.

Return to Grêmio

After the end of the loan he returned to Grêmio for the 2009 season. He played in the 2009 Copa Libertadores, and after playing his worst game in the tournament (incredibly missing three chances to score in the same attack) against Boyacá Chicó F.C. he was dubbed "the worst forward of the world" ("el peor delantero del mundo") by the Spanish magazine Mundo Deportivo.

However, Jonas scored 14 goals in the 2009 Campeonato Brasileiro Série A and was amongst the top goal scorers. Jonas has enjoyed further success throughout the 2010 season. He was top-scorer for Grêmio in the 2010 Campeonato Gaúcho and finished the top goal scorer in the Série A with 23 goals.

Valencia

Due to a low release fee (€1.25 million), Jonas rescinded his contract with Grêmio. He was finally transferred to Spanish club Valencia on 24 January 2011. He got his first goal for Los Che on 27 February, scoring a late winner in a 2-1 away victory for Valencia against Athletic Bilbao. He scored his second goal in an 24 April game against Real Madrid, which ended 3-6.

On 1 November 2011, Jonas scored the second fastest goal in Champions League history by netting inside 10.5 seconds, to give Valencia a 1-0 lead over Bayer Leverkusen. He just fell short of former FC Bayern Munich and Dutch national team striker, Roy Makaay's record of 10.12 seconds that he set against Real Madrid in the 2006-07 edition of the tournament. Valencia won the match 3-1.

He scored both goals for Valencia in a 2-0 Champions League win against Lille OSC on 02 October 2012.