"I didn't even know I was diving," he said. "I just came home one day and my mom told me to grab a swimsuit and that's how it started."
The Park City High School sophomore is making the most of it, becoming one of the best divers in the state.
Quinn dominated the UHSAA Region Diving Championships on Jan. 26, winning the 3A title by 52.05 points over Snow Canyon's Kale Winder. Quinn finished with a total score of 203.15, well ahead of Winder's 151.10.
Quinn's diving coach, Gene McIntyre, said he expected nothing less from the talented diver.
"The Region 3 championship was not a surprise to me," he said. "(Keaton)'s been a top-three diver all year."
Couple that with the fact that Quinn won the Region 3 championship as a freshman last year, and it's understandable that he has his sights set on bigger and better things.
"Winning state would be my goal," he said.
He'll get the chance to accomplish that on Thursday at the BYU pool, when he'll face off against the best divers in the state, regardless of class. The state meet features all the top scorers from all the regions battling out to see who is the best diver in the state.
McIntyre said he thinks Quinn has a chance to pull off an upset and win the state meet.
"I've coached a lot of different kids," he said. "He's a great kid and a very talented kid, too.
Quinn, who works with McIntyre two nights a week for about an hour and a half per session, said having him as a coach has really helped him progress.
"I think he's the best coach in the state," he said. "It's pretty cool to work with him."
Quinn hopes his diving prowess will eventually help pay for his college, which is his ultimate goal.
"Hopefully I can get a scholarship with it," he said. "If I can get into college with it, then I'll dive through college."
However, the self-described "normal teenager," who enjoys eating, sleeping and relaxing when he's not in the pool, doesn't plan on going any farther than college with his diving.
"I don't see myself going to the Olympics any time soon," he said.
But if he wins the state championship on Thursday, he might just have to reconsider.
The state meet begins at 8:30 a.m. with the girls' competition, followed by the boys at 11 a.m.
Get to know Keaton
Favorite class: Filmmaking
Favorite food: Taco Bell
Favorite movie: "House Bunny"
Favorite bands: Nicki Minaj and The Pretty Reckless
Favorite sports team: Dallas Cowboys
Favorite other sport to watch/play: Gymnastics and football
Dream job: Making money for doing nothing
Hobbies (other than sports): Eating and sleeping