Complex sentence: In the summer of 2012, after Cesena relegated from Serie A, the two parties ended the contract by mutual consent and Mutu signed a new contract with AC Ajaccio in the French championship.
Split into simpler sentences: In the summer of 2012, after Cesena relegated from Serie A, the two parties ended the contract by mutual consent. Subsequently, Mutu signed a new contract with AC Ajaccio in the French championship.