Wait, pro mini-golf? What’s that?

More than 50 percent of Americans play miniature golf at least once per year, according to the United States ProMiniGolf Association — aka the USPMGA. Yes, there are pro mini-golfers — multiple organizations host professional tournaments, with hundreds of pros worldwide.

There’s even an ABC game show, Holey Moley, now in its second season, featuring the sport. So what does it take to truly be a master of these miniature games?

The USPMGA holds tournaments featuring what the organization’s Ted Detwiler said are the best putters in the world, with thousands of dollars in prize money.

“They take it dead serious, they practice 10 hours a day,” Detwiler said.

Detwiler is an actor-turned-mini-golf-mogul, who joined the family business and works out of the organization’s South Carolina office and on projects (like Holey Moley) here in Los Angeles. His dad created mini-golf’s Master’s tournament.

Calling miniature golf a sport could come as a surprise to some, and Detwiler said he knows it may sound funny. But it uses many of the same skills that go into pro golfers’ putts — with the occasional added obstacles.

“I know it’s not the UFC, or football, but it’s really unique, and people take it serious — and they’re really good,” Detwiler said.

You can watch the video below to see what it’s like inside the world of professional mini golf.