PARIS, FRANCE - FEBRUARY 13: Sean O'Brien of Ireland leaves the field due to injury during the RBS Six Nations match between France and Ireland at the Stade de France on February 13, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)
PARIS, FRANCE - FEBRUARY 13: Sean O'Brien of Ireland leaves the field due to injury during the RBS Six Nations match between France and Ireland at the Stade de France on February 13, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)