Rory McIlroy and Shane Lowry prize money as they finish tied 12th at the Zurich Classic of New Orleans

-Credit:Jonathan Bachman/Getty ImagesRory McIlroy and Shane Lowry failed to mount a challenge during Sunday’s final round of the Zurich Classic of New Orleans, finishing six shots behind winners Andrew Novak and Ben Griffin at TPC Louisiana.The pair came into the tournament as defending champions and raced into contention following a brilliant 61 on Saturday to leave them five shots behind the eventual winners.However, they finished in a tie for 12th place during the foursomes on Sunday, with three bogeys on the back nine proving costly.READ MORE: Rory McIlroy's £2m dream house he had to sell, 'new house' plans, mansion with