1. Keirrison became a regular in Coritiba's main squad in 2007, helping the club win the Campeonato Brasileiro Serie B and being promoted to the following year's Campeonato Brasileiro Serie A He was the club's top goalscorer in that competition with 12 goals.
Keirrison was the top goalscorer of the Campeonato Paranaense in 2008 with 18 goals.
Keirrison finished as the Campeonato Brasileiro Serie A 2008's top goalscorer with 23 goals, tied with Washington of Fluminense and Kleber Pereira of Santos, being the youngest top scorer in the history of Brazil.
Many teams throughout Europe were linked with Keirrison after hearing of Barcelona's plan to loan-out the Brazilian in order to acclimatize him to European football, including Roma, Monaco and Ajax.
Keirrison scored his first goal for Benfica in a friendly against Celtic.
However, with the abundance of strikers in form at Benfica, Keirrison found it hard to break into the first team; to some, Keirrison was behind Oscar Cardozo, Nuno Gomes and Javier Saviola in the pecking order at the Estadio da Luz.
On 7 March 2014, Keirrison agreed a free transfer with Coritiba which was validated on 1 July, after his contract with Barcelona terminated.
In September 2015, Keirrison went to court against Coritiba requesting unpaid wages and medical expenses from a surgery to recover from an injury.
One director told the reason might be that "he [Keirrison] checked his bank account and the money was not there yet", thus deciding not to play.
On 18 January 2016, Keirrison flew to Thailand to sign for Buriram United, however both sides could not agree on a deal and the transfer deal fell through.
Keirrison scored eight goals in 24 starts for Londrina in 2016 before returning to Coritiba, via Arouca in Portugal, only to sign for Londrina on a 2-year contract in January 2018 to compete in the Campeonato Paranaense, Serie B and Copa do Brasil.
Keirrison was born in Dourados, Mato Grosso do Sul, the son of Operario footballer Adir Carneiro and Alzira Rosa de Souza.
Keirrison is married to Hevelin Buss, sister of former teammate and Brazilian international Henrique.