Earliest golf memory is hitting foam balls into a window with his grandpa, Young Dae Lim, who was a major influence as young Jeffrey developed a love for golf. Throughout his youth, Jeffrey spent the school year in South Korea but the summers in Los Angeles, where he would play Roosevelt Golf Course, an executive 9-hole course in Griffith Park. Jeffrey frequented Roosevelt Golf Couse with his grandpa, often chipping well into the evening.

Remembers the first professional golf event he attended being the 2001 Genesis Invitational; he remembers watching Tiger Woods hit balls and waiting near the locker room to get autographs from Tom Lehman and Scott Hoch.

Graduated from Sunny Hills High School in Fullerton, California. Other notable Sunny Hills alumni include Academy Award-winning director Kathryn Bigelow and National Baseball Hall of Fame inductee Gary Carter.

Favorite sports teams are the Los Angeles Lakers (NBA) and Los Angeles Dodgers (MLB).

Has a "crazy sweet tooth."

Enjoys playing computer games, watching TV, eating good food, and going to Starbucks.

Father, Soo Ho Kang, is an accomplished drummer in South Korea.

Played four seasons at University of Southern California (2010-14), earning All-Pac-10 Conference Second Team honors in 2011 and 2012.

Earned individual medalist honors and led Sunny Hills to the team title at the 2008 California Interscholastic Federation State High School Championship. Other notable state champions include PGA TOUR winners Rickie Fowler (2006), Patrick Cantlay (2010), and Xander Schauffele (2011).

Named to the 2009 AJGA Rolex Junior All-America First Team alongside Patrick Cantlay, Emiliano Grillo, Jordan Spieth, and Andrew Yun; he was previously named to the 2008 AJGA Rolex Junior All-America Second Team alongside Tyler McCumber.

Represented the United States alongside Jordan Spieth and Andrew Yun at the 2008 Junior Ryder Cup.

Represented the United States at the 2009 Toyota Junior Golf World Cup; his teammates included T.J. Vogel.