|Birth name||Aílson da Silva Feitosa|
|Born||13 August 1988 (age 28)
Sítio Novo do Tocantins, Tocantins, Brazil
|Height||1.76 m (5 ft 9 in)|
|Weight||74 kg (163 lb)|
|Updated on 12 April 2014.|
Aílson da Silva Feitosa (born 13 August 1988) is a Brazilian track and field athlete who competes in the sprints, specialising in the 200 metres. He is a frequent member of the Brazilian 4×100 metres relay team and won three gold medals for his country in 2011, taking titles at the South American Championships in Athletics, Military World Games and Pan American Games.
Born in Sítio Novo do Tocantins, he began competing at national level in 2005 and won a number of medals in the 100 metres and 200 metres in the youth, junior and under-23 sections of the Brazilian championships. He represents the BM&F Bovespa club. Feitosa made his first international appearances in 2007: at the South American Junior Championships he was fourth in the 200 m and led off the Brazilian team to the 4×100 metres relay silver medal. He was also part of the relay team at the 2007 Pan American Junior Athletics Championships where Brazil finished fourth. In 2008 he broke the 21-second mark for the 200 m, running a time of 20.96 seconds. The following year he improved his 100 m best to 10.32 seconds at the São Paulo regionals.
The 2011 season saw Feitosa win a series of gold medals. In June he placed sixth in the individual 200 m at the 2011 South American Championships in Athletics before going on to win the 4×100 m relay title for Brazil. The 2011 Military World Games were held in Rio de Janeiro a month later and he won the relay title with a team of Vicente de Lima, Basílio Morais Junior and Nilson André. He also came sixth in the 200 m final. The 2011 Pan American Games was Feitosa's third international selection for the Brazilian relay squad that year and he led off the team including Sandro Viana, Nilson André and Bruno de Barros which went on to equal the Pan American Games record time of 38.18 seconds for the event.
- 100 m: 10.30 (wind: +2.0 m/s) – São Paulo, 5 April 2014
- 100 m (wind assisted): 10.19 w (wind: +2.1 m/s) – Campinas, 4 May 2013
- 200 m: 20.62 (wind: +1.7 m/s) – São Paulo, 12 May 2012
- 400 m: 46.79 – São Paulo, 22 February 2014
|2007||South American Junior Championships||São Paulo, Brazil||4th||200 m||21.69 (wind: -0.2 m/s)|
|2nd||4 x 100 m relay||40.66|
|Pan American Junior Championships||São Paulo, Brazil||5th (h)||200 m||21.41 (wind: +0.0 m/s)|
|4th||4 x 100 m relay||40.64|
|2008||South American U-23 Championships||Lima, Perú||1st||4 x 100 m relay||40.06|
|2010||Ibero-American Championships||San Fernando, Spain||–||4 x 100 m relay||DQ|
|2011||South American Championships||Buenos Aires, Argentina||6th||200 m||22.07 (wind: +1.7 m/s)|
|1st||4 x 100 m relay||39.87|
|Military World Games||Rio de Janeiro, Brazil||6th||200 m||21.26 (wind: +1.2 m/s)|
|1st||4 x 100 m relay||39.53|
|Pan American Games||Guadalajara, México||1st||4 x 100 m relay||38.18 A|
|2014||South American Games||Santiago, Chile||1st||4 x 100 m relay||38.90|
|1st||4 x 400 m relay||3:03.94|
|2016||Ibero-American Championships||Rio de Janeiro, Brazil||2nd||4 x 100 m relay||38.65|
- Ailson Feitosa. BM&F Bovespa. Retrieved on 2011-11-03.
- 2007 South American Junior Championships. World Junior Athletics History. Retrieved on 2011-11-03.
- 2007 Pan American Junior Championships. World Junior Athletics History. Retrieved on 2011-11-03.
- Ailson Feitosa. Tilastopaja. Retrieved on 2011-11-03.
- Biscayart, Eduardo (2011-06-06). Brazil retains South American title in Buenos Aires – Final Day. IAAF. Retrieved on 2011-11-03.
- CISM Río de Janeiro BRA 17 - 23 July. Tilastopaja. Retrieved on 2011-11-03.
- Robinson, Javier Clavelo (2011-10-31). Nava and da Silva take last athletics titles in Guadalajara as Pan American Games conclude. IAAF. Retrieved on 2011-11-03.