Veteran out-half Johnny Sexton called it quits at the end of the Rugby World Cup at the age of 38 and the recently-turned 24-year-old Crowley has won the race to fill the vacancy in this Friday’s Guinness Six Nations opener away to France. Veteran out-half Johnny Sexton called it quits at the end of the Rugby World Cup at the age of 38 and the recently-turned 24-year-old Crowley has won the race to fill the vacancy in this Friday’s Guinness Six Nations opener away to France.