Complex sentence: Rochat began his career with FC Renens and joined than in March 2002 to FC Crissier, he played by FC Crissier twenty three months before was scouted from FC Lausanne-Sport in February 2004.
Split into simpler sentences: Rochat began his career with FC Renens after which he moved to FC Crissier in March 2002. His stay in Crissier lasted just twenty three months before was scouted from Lausanne-Sport, making the move in February 2004.