Dave Cleveland/Maine Imaging

Two men beat incredible odds during a round of golf this week: they hit holes-in-one within seconds of each other on the same hole at the Portland Country Club in Maine.

The odds of two people in the same foursome each hitting a hole in one are 17 million to 1, according to the National Hole-in-One Registry.

Matt Parker and Travis Ferrante each hit a hole-in-one on the fourth hole Tuesday. It was Parker's first and Ferrante's second such shot. A third member of their group hit his ball within a foot of the same hole, nearly making it three hole-in-ones on one hole, according to Steve Cassella, an assistant PGA professional at the course.

"I had the 2nd shot," Ferrante told ABC News. "We were playing a match so I was a little frustrated when Matt's went in. My first instinct was to throw him on my shoulders and dump him in the water."

According to Parker, the 17 million to one odds don't sound quite right.

"I'm a pretty awful golfer, and this was probably the first time I've ever even hit the green on that hole," Parker told ABC News. "It's got to be 17 billion to one for me to be included in that."

For a hole-in-one to become official, the golfers must finish the course. Ferrante, Parker and their team rushed to finish all 18 holes before a thunderstorm hit the course, making their hole-in-ones count officially. They made it just in time, and making the day even stranger, saw a double rainbow after the storm.

According to golf tradition, when someone hits a hole-in-one, they buy a round of drinks for everybody at the bar. Those still there when Ferrante and Parker finished their round were also lucky that day.

"Everyone at the bar got two drinks, one from each of us. The double rainbow, the two hole in ones, the crazy storm - it was a crazy but exciting day," Ferrante told ABC News.

Even more unlikely, another golfer hit a hole-in-one several hours earlier on the seventh hole of the course.

"I've never heard of something like three hole-in-ones happening on one course before," Cassella told ABC News. "Definitely not on this course. That's just unheard of."

The odds of an average golfer hitting a hole-in-one are 12,000 to 1, according to the National Hole-in-One Registry.

"It's something I'm 100 percent sure that I'll never see again," Ferrante said.

"Now I have a good golf story," Parker said. "I have a lot of, 'You should have seen how bad my shot was,' stories, but now I have one that will probably trump everybody else's on any course."