Complex sentence: He played again against Watford and Brighton before the month was out but this would be the sum of his Norwich City contribution and after failing to secure a first team place, he left at the end of the season.
Split into simpler sentences: He played again against Watford and Brighton before the month was out. But this would be the sum of his Norwich City contribution and after failing to secure a first team place, he left at the end of the season.