Complex sentence: After a successful run in the first team during his loan at Brühl, Spiegel returned to Grasshopper and was transferred on 23 July 2012 to West Ham United after their return to the English Premier League for an undisclosed fee.
Split into simpler sentences: After a successful run in the first team during his loan at Brühl, Spiegel returned to Grasshopper. On 23 July 2012, Spiegel signed for West Ham United after their return to the English Premier League, for an undisclosed fee.