Complex sentence: His record in the early years were poor, and Tottenham were bottom of the league at the end of the 1914--15 season when football was suspended due to the First World War that started a year earlier.
Split into simpler sentences: His record in the early years were poor, and Tottenham were bottom of the league at the end of the 1914--15 season. Football was then suspended due to the First World War that started a year earlier.