PEBBLE BEACH, CA - JUNE 17: Amateur Byeong-Hun An of Korea hits a shot on the second hole during the first round of the 110th U.S. Open at Pebble Beach Golf Links on June 17, 2010 in Pebble Beach, California. (Photo by Ross Kinnaird/Getty Images)
PEBBLE BEACH, CA - JUNE 16: Amateur Byeong-Hun An of South Korea watches his shot during a practice round prior to the start of the 110th U.S. Open at Pebble Beach Golf Links on June 16, 2010 in Pebble Beach, California. (Photo by Stephen Dunn/Getty Images)
AUGUSTA, GA - APRIL 09: Amateur Byeong-Hun An of South Korea plays a bunker shot on the tenth hole during the second round of the 2010 Masters Tournament at Augusta National Golf Club on April 9, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 09: Amateur Byeong-Hun An of South Korea hits his approach shot on the tenth hole during the second round of the 2010 Masters Tournament at Augusta National Golf Club on April 9, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 09: Amateur Byeong-Hun An of South Korea plays a bunker shot on the tenth hole during the second round of the 2010 Masters Tournament at Augusta National Golf Club on April 9, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 08: Amateur Byeong-Hun An of South Korea plays his second shot on the 17th hole during the first round of the 2010 Masters Tournament at Augusta National Golf Club on April 8, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 08: Amateur Byeong-Hun An of South Korea plays his third shot on the tenth hole during the first round of the 2010 Masters Tournament at Augusta National Golf Club on April 8, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 08: Byeong-Hun An of South Korea hits his second shot on the 11th hole during the first round of the 2010 Masters Tournament at Augusta National Golf Club on April 8, 2010 in Augusta, Georgia. (Photo by David Cannon/Getty Images)
AUGUSTA, GA - APRIL 06: Amateur Byeong-Hun An of South Korea walks across a green during a practice round prior to the 2010 Masters Tournament at Augusta National Golf Club on April 6, 2010 in Augusta, Georgia. (Photo by Harry How/Getty Images)
AUGUSTA, GA - APRIL 06: Amateur Byeong-Hun An of South Korea plays a shot during a practice round prior to the 2010 Masters Tournament at Augusta National Golf Club on April 6, 2010 in Augusta, Georgia. (Photo by Harry How/Getty Images)
AUGUSTA, GA - APRIL 06: Amateur Byeong-Hun An of South Korea plays a shot during a practice round prior to the 2010 Masters Tournament at Augusta National Golf Club on April 6, 2010 in Augusta, Georgia. (Photo by Harry How/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An checks his scorecard during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits an approach shot on the first 18th hole during the 36-hole Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits onto the green on the 1st hole during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An reacts to a missed putt during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An watches a tee shot during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An watches a tee shot during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits out of a bunker as spectators look on during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits an approach shot on the 5th hole during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits a tee shot during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Spectators gather around the 6th green as Byeong-Hun An prepares to putt during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits out of the rough on the 6th hole during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An hits an approach shot on the 13th and final hole during the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 30: Byeong-Hun An poses with the trophy after winning the Finals of the U.S. Amateur Golf Championship on August 30, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)
TULSA, OK - AUGUST 29: Byeong-Hun An watches a tee shot during the Semifinals of the U.S. Amateur Golf Championship on August 29, 2009 at Southern Hills Country Club in Tulsa, Oklahoma. (Photo by G. Newman Lowrance/Getty Images)