Allenby was at the popular Amuse Wine Bar in the tourist-laden Waikiki with his close friend Anthony Puntoriero after missing the cut at the Sony Open.
The 43-year-old believes the suspects may have drugged him before he was taken to an underground car park where he was knocked out, robbed and thrown into the boot of a car.
Allenby has noticeable damage and lacerations to his nose and forehead.
"I didn't think I was going to survive this one," Allenby told AAP.
"I was separated from my friend in the bar after we had paid the tab at 10:48pm and he went to the bathroom and next thing you know I'm being dumped in a park miles away.
"I only know this part because a homeless woman found me and told me she saw a few guys pull up and throw me out of the car.
That is where I got the scrapes above my eye from the sidewalk."
Shaken and in a bad way Allenby realised he was without his phone, wallet or any cash and was starting to be harassed by other homeless people in the park.
"The homeless woman got me away from the others and then a retired military guy walking past came to my aid," he said.
"He got me into a taxi and paid for me to get to my hotel and I called police from there. I have his details and will be getting back in touch with him for sure."
The four-time PGA Tour winner has been assisting police and PGA Tour FBI officials with inquiries.
"We have some names and numbers and they have some leads to follow up, so I am confident they will get the guys," Allenby said.
"With the FBI guys involved, they're the best, the guys on the tour are awesome, and they'll get to the bottom of it."
Allenby was most concerned about potentially not being able to call 13-year-old daughter Lily for her birthday, but scans have cleared him of any serious facial or head injuries and he is hopeful of being cleared to fly in the next day or two.
"She's really upset about it but at the end of the day it could have been a lot worse," the Victorian said.
"I don't care about the money or my cards or anything like that.
I am just glad I have survived this one."
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