Signed with the Fire on Dec. 30, 2014 from Brazilian Serie A side Esporte Clube Bahia, where h played since June 26, 2014.
Adaílton began his professional career with his hometown side Vitória in 2003, and made 34 appearances and scored four goals before departing for French Ligue 1 side Rennes in 2004.
Following three seasons in France where he appeared in 42 league and six UEFA Cup matches for Les Rouges et Noirs, Adaílton returned to Brazil and joined Santos in 2007. From 2007-09, Adaílton appeared in 40 Brasileiro Série A and two Libertadores matches for Santos.
In 2010, Adaílton completed a transfer to FC Sion of the Swiss Super League and made 54 competitive appearances, including two in UEFA Europa League play against Celtic in 2011, and scored two goals before departing for a six-month loan to Chinese Super League side Henan Jianye F.C. in 2012, where he made 5 appearances for the Red Devils.
Adaílton returned to Sion and appeared in 41 Super League and two Swiss Cup matches from 2012-13 before he was loaned to fellow Swiss side FC Chiasso, where he played 25 matches prior to joining Bahia.
A youth international, Adaílton captained Brazil in the 2003 FIFA U-20 World Cup, scoring once in the group stages and leading Brazil to the 1-0 victory against Spain in the final match.
Full name is Adaílton José dos Santos Filho.