Jon Rahm won the Irish Open by six shots on Sunday. Photo: Niall Carson, PA via AP

PORTSTEWART – Jon Rahm fired a stunning seven-under-par final round of 65 to cruise to a six-shot victory in the Irish Open at Portstewart on Sunday.

The Spaniard avoided a two-stroke penalty early in his round on his way to joining the greats of Spanish golf, including the late Seve Ballesteros, in winning the tournament.

The 22-year-old Rahm was in a class of his own with two eagles and five birdies on the day as he finished on 24-under-par overall.

His effort is a new tournament record, and three strokes less than the previous mark that stood for 42 years.

Rahm was met by a rules official after an incident on the sixth green, but under new rules introduced after the controversy following the much-publicised Lexi Thompson penalty at the women’s ANA Inspiration in April, was afforded a new benefit of the doubt.

Scotland’s Richie Ramsay (65) and England’s Matthew Southgate (66) shared second place on 18-under.

Justin Rose ended joint fourth, a further shot back, in a tournament where Irish star Rory McIlroy missed the cut.