|Full name||Otacílio Mariano Neto|
|Date of birth||17 November 1982|
|Place of birth||Orós, Brazil|
|Height||1.80 m (5 ft 11 in)|
|Blumenau Esporte Clube|
|2004||→ Portuguesa (loan)||0||(0)|
|2005||→ Oeste (loan)|
|2005||→ Barretos (loan)|
|2007||→ Figueirense (loan)||25||(7)|
|2009||→ Grêmio Barueri (loan)||20||(1)|
|2010||→ Ponte Preta (loan)||1||(0)|
|2010||→ Goiás (loan)||14||(1)|
|2011||→ Noroeste (loan)|
|2011||→ Bragantino (loan)||12||(4)|
|2012||→ Ituano (loan)||0||(0)|
|2015||Ypiranga de Erechim|
|2015||Guarani de Juazeiro|
|2015–2016||Sete de Dourados|
|* Senior club appearances and goals counted for the domestic league only|
He then loaned to Portuguesa, Oeste and Barretos. On 1 July 2005 he returned to Noroeste. In December 2005, he signed a contract extension, which last until December 2006. He played twice in national cup that season. In June 2006 he extended his contract again, which last until December 2007. He finished as the last 16 (third stage) in 2006 Campeonato Brasileiro Série C with Noroeste He played 14 out of possible 18 matches, scored once. In 2007 season he played 3 times in the national cup, and scored 7 goals in 17 appearances at 2007 Campeonato Paulista. He finished as the runner-up at 2007 Campeonato Paulista do Interior. After renewed his contract with club in June 2007, he was loaned to Figueirense. He made his Campeonato Brasileiro Série A debut with the Santa Catarina side, played 25 league matches. He also played twice in 2007 Copa Sudamericana first round.
In February 2008 he renewed his contract again which last until December 2009. He was the team top-scorer at 2008 Campeonato Paulista, scored 10 goals in the first 12 games of the state league, including a hat-trick against Ituano on 27 January 2008. However, he did not play the rest of the matches, as he was injured during training. The team finished as the runner-up again in 2008 Campeonato Paulista do Interior.
In August 2008 he was signed by Corinthians Paulista for R$ 675,000 on a 4-year contract., which the club acquired 40% economic rights and the rest was owned by an investor "Luis Fernando Assessoria Esportiva". Corinthians later bought more economic rights and cost an additional R$575,000.
In January 2010, he was loaned to Ponte Preta, He scored 2 goals for the team at 2010 Campeonato Paulista. He played 13 times (all start) in the state league and infamously cautioned 10 times and sent off once (after cautioned second time on 20 February, round 10). The team finished as the semi-finalists in 2010 Campeonato Paulista do Interior. He played his only match at 2010 Campeonato Brasileiro Série B on 15 May.
In June left for Goiás, rejoining Wellington Saci. Noroeste also wanted to re-sign Otacílio in October 2010. He played for Goiás at 2010 Copa Sudamericana semi-finals (both legs) and finals (both legs), scored once in the final first leg. The team losing to Independiente after penalty shootout, which Otacílio already substituted by Éverton Santos due to injury.