Jay Haas backed Tuesday his decision to give a Presidents Cup captain’s pick to veteran Phil Mickelson, saying the five-time Major winner offered something “intangible” to his US team.

As the players headed out for their first full day of practice at the Jack Nicklaus Golf Club in Incheon, South Korea, Haas strongly defended his decision to choose Mickelson as one of two picks in his 12-man team after finishing only 30th in the US qualifying list.

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“I don’t think there were any negatives to any of the players that we passed over,” said Haas in a news conference. “I think Phil (and) the intangible that he brought to the team maybe put him over the top.”

Mickelson is the only man to play at every Presidents Cup since its inception in 1994, when he was also a captain’s pick.

The amiable “Lefty” was runner-up to team mate Jordan Spieth at the US Masters in April, but has shown little form since, registering just two top-10 finishes and falling to 24th in the world.

But he has also played in the last 10 Ryder Cups and has scored more Presidents Cup points than anyone else in the event’s history.

Haas believes that experience will be invaluable as the US try to extend a proud record in the biennial match play team event where they have only lost once, back in 1998.

“Obviously you cannot replace his experience in this,” added Haas, who said Mickelson’s mere presence in Incheon was a huge lift to the team.

“You could say, well, his play didn’t warrant being a consideration and all that. But I don’t know that you can put a value on what he means to the players and the demeanour that he brings into the team room.”

“Phil has been great already. He’s been Phil, and he asked: ‘What do you want me to do?” And I said: ‘I want you to be you.’

“I think that’s one of the main reasons we picked him is to lift the players’ spirits, to keep them loose.”

He said that the choice of Mickelson had been unanimously endorsed by the other players and his assistant captains, Fred Couples, Davis Love III and Steve Stricker.

“Across the board, the players were all-in when we were texting them and talking to them. The captains, certainly, were all about Phil,” Haas said.

Matt Kuchar was late to join his US team-mates in South Korea, only arriving on Monday night after a prior weekend commitment back home.

But Haas said his laid-back captaincy style meant that the late arrival was not an issue for him. “I’m not a hard-ass captain,” he joked. “It’s fine.”