An won the 2009 U.S. Amateur Championship at Southern Hills C.C. in Tulsa, Okla., with 7-and-5 win over Ben Martin; he was a semifinalist one year later in the 2010 U.S. Amateur at Chambers Bay. He broke through with his first European Tour victory in the circuit's flagship event, the BMW PGA Championship, in 2015, shooting a final-round 65 to win by six strokes over Thongchai Jaidee and Miguel Angel Jimenez. His other professional win came in the 2014 Rolex Trophy on the European Challenge Tour. An was the runner-up in the 2016 Zurich Classic of New Orleans. His father, Jae-Hyung Ahn, and mother, Jiao Zhimin, were both medalists in table tennis at the 1988 Summer Olympics in Seoul; Byeong-Hun moved to the U.S. in 2005 to attend David Leadbetter Academy in Florida, and briefly attended the University of California-Berkeley before turning pro in 2011.
|2016||Oakmont Country Club||74-70-73-70--287||+7||T-23|
|2010||Pebble Beach Golf Links||79-75||+12||MC|