In 2012, in a 3–2 win against Santos FC in the State League, he played as right back, with the responsibility of marking Neymar.

He executed the movimento do escorpião (In English, Scorpion Movement), a well known move in indoor soccer, to prevent some dribbles and shots from Neymar.

[2] In 2013, with Paulo Miranda and Edson Silva injured, Caio started playing as a centre back.

Caio continued to perform so well that Antônio Carlos, hired by the club in the middle of the Brazilian League season, was mostly confined to the substitutes' bench.

[3] On 2 August 2014, Caio damaged his anterior cruciate ligament, going on to miss a further several months.