At age 8, Na's family moved from South Korea to the United States. Took up the game a year later and by the time he left the junior golf program, had become a top junior player in the U.S. Bypassed senior year of high school and college to turn professional at age 17.
Appeared in a January 2010 episode of "CSI: Las Vegas" on CBS along with Rocco Mediate, Duffy Waldorf, Gary McCord and David Feherty.
A year after carding a 12-over 16 on the par-4 ninth hole in the first round of the 2011 Valero Texas Open, returned to San Antonio, taking the mishap in stride. Taped a segment for "Inside the PGA TOUR," using a chainsaw to remove a number of branches responsible for the high score a year earlier, was featured on ESPN's "SportsCenter" and various, local radio stations as he re-lived the headache. In the second round in 2012, hung the shirt he wore that fateful day on a tree branch as a sacrifice near the area from where he tried to play en route to the 16th hole.