Complex sentence: In 2003, aged 25, Moretto decided to try his luck in Portugal, joining S.C. Salgueiros, at the time playing in the second division, and made a very good first impression during the team's pre-season matches.
Split into simpler sentences: In 2003, aged 25, Moretto decided to try his luck in Portugal. He represented S.C. Salgueiros, at the time playing in the second division, and made a very good first impression during the team's pre-season matches.