Complex sentence: Frei has came through the ranks at FC Basel and was moved in to the full team ahead of the 2007/08 season after becoming one of the best midfielders in the reserve squad and played a major part in Basel's title and cup win in the 2007/08 season.
Split into simpler sentences: Frei has came through the ranks at FC Basel and was moved in to the full team ahead of the 2007/08 season after becoming one of the best midfielders in the reserve squad. He played a major part in Basel's title and cup win in the 2007/08 season.