Marseille Front Office
Villas-Boas replaces Rudi Garcia as manager.
Rafa Benitez, Gabriel Heinze, Andre Villas-Boas and Claude Puel have been linked as his replacement.
Balotelli hasn't played since early December after falling out with Patrick Vieira.
Kevin Strootman made 130 appearances for Roma, scoring 13 goals.
Antoine Griezmann scored in the 21st and 49th minutes while Gabi scored in the 89th minute.