Rory McIlroy and Shane Lowry won the PGA Tour's Zurich Classic of New Orleans team event on Sunday after a playoff win over Chad Ramey and Martin Trainer.

The USA-French pairing of Ramey and Martin had started the day of foursomes [alternate shot] seven strokes off the lead but a brilliant nine-under par round of 63 saw them fly to the top of the leaderboard.

That left the final groups under some pressure to reach the target of 25-under and only McIlroy and Lowry, who played together on the Irish Olympic team and for Europe in the Ryder Cup, were able to get there.

After Lowry, the 2019 British Open champion, missed a par putt on the 17th, the Irish pair knew they needed to make birdie on the 18th to get into a playoff by tying the clubhouse leaders.

World number two McIlroy blasted his drive down the fairway and after Lowry's approach shot left him some work to do, the Northern Irishman produced a wonderful chip that left Lowry with a straightforward five footer for birdie.

Ramey and Trainer had been off the course for three hours and it perhaps showed on the first playoff hole, the 18th.

French-born Trainer drove to just behind a fairway bunker but teammate Ramey's 3-wood was hooked far left and after Trainer's chip was short, Ramey missed his putt from off the green, meaning par was the best they could get.

Lowry's approach shot had ended up in a greenside bunker but McIlroy got it safely on to the green and left Lowry with a chance at birdie and victory.

Lowry has conceded that he has been struggling on the greens of late and he missed the seven-foot putt, leaving Trainer with a putt to extend the playoff.

But Trainer missed to hand victory to the Irish pairing.

The win was McIlroy's 25th on the PGA Tour while for Lowry it was his third and his first at a PGA Tour sanctioned event since his British Open triumph at Portrush. (AFP)