Thg Irishman shot one over, however was still an easy winner at the Open Championship.
The Claret Jug is staying on the Emerald Isle after Shane Lowry captured the first PGA British Open to be held in Northern Ireland since 1951.
Lowry endured the worst weather of the tournament, along with the Sunday pressure of a sellout crowd cheering him along to win the final major of the year by six shots at Royal Portrush.
Lowry's 15-under total was far better than runner-up Tommy Fleetwood, whose double-bogey on 14 left Lowry without a serious challenger.
The 32-year-old Lowry closed with a 1-over 72.
Amid rain and strong wind, Lowry began making bogeys in the middle of the round without losing ground as no one from the last 12 groups broke par.
Lowry was no worse than three shots ahead all day as he wrapped up his first major championship.
Tony Finau finished third at 7 under, one ahead of Brooks Koepka and Lee Westwood.