Leading money winner on the Japan Golf Tour in 2011; earned his first PGA Tour victory in 2013, winning the HP Byron Nelson Championship.
He attended Sungkyunkwan University in South Korea.
His first pro tournament win came in 2007 at the SK Telecom Open on the Asian Tour.
He grew up in Daegu, South Korea.
To win the 2013 HP Byron Nelson Championship, he beat Keegan Bradley by two strokes.