Complex sentence: He had played 31 league games for the side and at the end of the 2002/2003 season the club decided to offer him a new contract how ever, it was worth only one-third of his previous contract.
Split into simpler sentences: He had played 31 league games for the side, and at the end of the 2002/2003 season, the club decided to offer him a new contract. However, it was worth only one-third of his previous contract.