Complex sentence: On 10 June 2006, Lettieri signed a two--year contract with SV Darmstadt 98, he was there until the second half of the 2006/2007 season when Wacker Burghausen appointed him as their manager, but in July he was sacked following the club's relegation.
Split into simpler sentences: On 10 June 2006, Lettieri signed a two--year contract with SV Darmstadt 98. However, in July he was sacked following the club's relegation.