Since then , Grassi has competed in the last four FIA World Endurance Championships .
Since then , Grassi raced at the Le Mans 24 - hour race for the past three seasons , with a best finish of second in 2014 .
Since then , Grassi has competed in the last four FIA World Endurance Championships and raced at the Le Mans 24 - hour race for the past three seasons , with a best finish of second in 2014 .