Complex sentence: He has toured with jazz trumpeter Chris Botti, was lead soloist for Riverdance, and the Twelve Irish Tenors, and a semi-finalist on America's Got Talent (season 1).
Split into simpler sentences: He has toured with jazz trumpeter Chris Botti. He was lead soloist for Riverdance and the Twelve Irish Tenors, and a semi-finalist on America's Got Talent (season 1).