Clément Grenier born on 07/01/1991 in Annonay, France. He began his career with his hometown club FC Annonay starring with the club's under-9 team. In July 2002, he secured a move to Lyon, joining the club's youth academy. On 28 January 2017, he joined Serie A side AS Roma on loan until the end of the 2016–17 season with an option for a permanent move. On 31 January 2018, Grenier signed a year and a half contract with fellow Ligue 1 side En Avant de Guingamp. On 24 July 2018, Grenier signed a three year contract with Rennes.