Career
Born in Botucatu, São Paulo, Clayson made his senior debuts for União São João in 2012, aged only 16. After scoring one goals in three appearances, he was loaned to Grêmio, returning to youth setup. On 18 February 2013 Clayson joined Ituano, making his debut for the club on 24 March, coming on as a second-half substitute in a 1–2 home loss against Oeste for the Campeonato Paulista championship.
Clayson scored his first professional goal on 15 March 2015, netting his side"s only in a 1–2 loss at Grêmio Osasco Audax.