In 1999, Leonardo Martins decided to officially join the adult entertainment business. The beefy actor was able to participate in 89 erotic films until his retirement in 2009. Leonardo's debut film was released by Panteras which was titled Cunhada. He was next seen in Depois Do Amor and worked alongside Fabio Scorpion, Samantha Bolth and Juliano Ferraz. Porn Academy also featured Leonardo Martins in Anal Radical where he performed under the direction of Giba. In 2005, he joined the casts of Antes Durante e Depois 1 exclusively distributed by Explicita Video. Meanwhile, his non sex performance was featured in Gabriela Cravo e Canela directed by Richard de Castro. Leonardo Martins was also featured in Big Butts from Brazil 2, Pretty Little Latinas 6, My Neighbor Gets Me Horny and House of Sex.