Complex sentence: He started his career with Sanat Naft F.C. before moving to Saipa F.C. of Karaj in the Iran Pro League, at age 19; he played three seasons with the latter, displaying good overall dribbling skills and being dubbed "The New Karimi".
Split into simpler sentences: He started his career with Sanat Naft FC, before moving to Saipa F.C. of Karaj in the Iran Pro League, at age 19. He played three seasons with the latter, displaying good overall dribbling skills, and being dubbed "The New Karimi".