Born in Seoul, South Korea,[1] Na emigrated with his family to the United States when he was eight years old, settling in southern California.

He left Diamond Bar High School after his junior year to play professional golf at age 17.

In February 2011, Na was in contention to win his first PGA Tour title at the Northern Trust Open.

On October 1, 2011, Na apparently whiffed his tee shot on the par-4 15th hole in the third round of the Justin Timberlake Shriners Hospitals for Children Open at TPC Summerlin in Las Vegas, missing high and to the outside of the ball.

He shot a final round 65 with birdies at 15, 16 and 17 to win by two strokes from Nick Watney and earn $792,000 in prize money.

During the 2012 PGA Tour season, Na finished fourth at the Arnold Palmer Invitational, fifth at the Phoenix Open and AT&T Pebble Beach National Pro-Am, seventh at the Players Championship and 12th at Masters Tournament.

After rehabbing, he made a comeback in October in his first PGA Tour start since April with a third-place finish at the Frys.com Open.

At the 2016 U.S. Open at Oakmont Country Club, Na finished in 7th place after shooting 75-68-69-69 for a total of 1 over par.

Na claimed his third PGA Tour win, with a four shot victory at the Charles Schwab Challenge in 2019.

The tournament ended on the second sudden-death playoff hole at the Shriners Hospitals for Children Open at TPC Summerlin in Las Vegas.

[11] In September 2021, Na finished third at the Tour Championship at East Lake Golf Club in Atlanta, Georgia.

[12] In June 2022, Na announced his resignation from the PGA Tour, confirming that he would be joining the LIV Golf Invitational Series.

1Cancelled due to COVID-19 pandemic QF, R16, R32, R64 = Round in which player lost in match play NT = No tournament "T" = Tied Note that the HSBC Champions did not become a WGC event until 2009.