<P> In golf, a perfect round is a round of eighteen holes where all holes were played on average at one under par (average of birdie on every hole) resulting in a score of 55 on a par 73 course, 54 on a par 72 course, 53 on a par 71 course, and 52 on a par 70 course . The term' perfect round' is used for a 54 as the lowest score generally accepted as being in the realm of possibility among professional golfers on a par 72 course . This has remained the standard and has never been achieved by a professional golfer in a professional event . </P> <P> The lowest officially recorded score is 55 by Rhein Gibson and this score is recognized by the Guinness World Records . Four other rounds of 55 are documented, but these are commonly discounted due to the quality of the course or the nature of the round (e.g., a non-competitive round). </P> <P> In official golf tournaments on major tours: </P> <Table> <Tr> <Th> Player </Th> <Th> Score </Th> <Th> To par </Th> <Th> Rnd </Th> <Th> Finish </Th> <Th> Year </Th> <Th> Tour </Th> <Th> Tournament </Th> <Th> Ref </Th> </Tr> <Tr> <Td> Ishikawa, Ryo Ryo Ishikawa </Td> <Td> 58 </Td> <Td> − 12 </Td> <Td> 4 / 4 </Td> <Td> </Td> <Td> </Td> <Td> Japan Golf Tour </Td> <Td> The Crowns </Td> <Td> </Td> </Tr> <Tr> <Td> Jäger, Stephan Stephan Jäger </Td> <Td> 58 </Td> <Td> − 12 </Td> <Td> 1 / 4 </Td> <Td> </Td> <Td> 2016 </Td> <Td> Web.com Tour </Td> <Td> Ellie Mae Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Furyk, Jim Jim Furyk </Td> <Td> 58 </Td> <Td> − 12 </Td> <Td> 4 / 4 </Td> <Td> 5! T5 </Td> <Td> 2016 </Td> <Td> PGA Tour </Td> <Td> Travelers Championship </Td> <Td> </Td> </Tr> <Tr> <Td> Geiberger, Al Al Geiberger </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 2 / 4 </Td> <Td> </Td> <Td> 1977 </Td> <Td> PGA Tour </Td> <Td> Danny Thomas Memphis Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Beck, Chip Chip Beck </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 3 / 5 </Td> <Td> 3! T3 </Td> <Td> 1991 </Td> <Td> PGA Tour </Td> <Td> Las Vegas Invitational </Td> <Td> </Td> </Tr> <Tr> <Td> Begay III, Notah Notah Begay III </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 2 / 4 </Td> <Td> 6! T6 </Td> <Td> 1998 </Td> <Td> Nike Tour </Td> <Td> Dominion Open </Td> <Td> </Td> </Tr> <Tr> <Td> Dunakey, Doug Doug Dunakey </Td> <Td> 59 </Td> <Td> − 11 </Td> <Td> 2 / 4 </Td> <Td> 2! T2 </Td> <Td> 1998 </Td> <Td> Nike Tour </Td> <Td> Miami Valley Open </Td> <Td> </Td> </Tr> <Tr> <Td> Duval, David David Duval </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 5 / 5 </Td> <Td> </Td> <Td> 1999 </Td> <Td> PGA Tour </Td> <Td> Bob Hope Chrysler Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Sörenstam, Annika Annika Sörenstam </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 2 / 4 </Td> <Td> </Td> <Td> 2001 </Td> <Td> LPGA Tour </Td> <Td> Standard Register PING </Td> <Td> </Td> </Tr> <Tr> <Td> Kuramoto, Masahiro Masahiro Kuramoto </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 1 / 4 </Td> <Td> </Td> <Td> 2003 </Td> <Td> Japan Golf Tour </Td> <Td> Acom International </Td> <Td> </Td> </Tr> <Tr> <Td> Gore, Jason Jason Gore </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 2 / 4 </Td> <Td> </Td> <Td> 2005 </Td> <Td> Nationwide Tour </Td> <Td> Cox Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Mörk, Adrien Adrien Mörk </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 2 / 4 </Td> <Td> </Td> <Td> 2006 </Td> <Td> Challenge Tour </Td> <Td> Tikida Hotels Agadir Moroccan Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Goydos, Paul Paul Goydos </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 1 / 4 </Td> <Td> </Td> <Td> </Td> <Td> PGA Tour </Td> <Td> John Deere Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Appleby, Stuart Stuart Appleby </Td> <Td> 59 </Td> <Td> − 11 </Td> <Td> 4 / 4 </Td> <Td> </Td> <Td> </Td> <Td> PGA Tour </Td> <Td> Greenbrier Classic </Td> <Td> </Td> </Tr> <Tr> <Td> Wilcox, Will Will Wilcox </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 4 / 4 </Td> <Td> 3! T3 </Td> <Td> 2013 </Td> <Td> Web.com Tour </Td> <Td> Utah Championship </Td> <Td> </Td> </Tr> <Tr> <Td> Knox, Russell Russell Knox </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 2 / 4 </Td> <Td> 12! T12 </Td> <Td> 2013 </Td> <Td> Web.com Tour </Td> <Td> Albertsons Boise Open </Td> <Td> </Td> </Tr> <Tr> <Td> Furyk, Jim Jim Furyk </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 2 / 4 </Td> <Td> </Td> <Td> 2013 </Td> <Td> PGA Tour </Td> <Td> BMW Championship </Td> <Td> </Td> </Tr> <Tr> <Td> Sutherland, Kevin Kevin Sutherland </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 2 / 3 </Td> <Td> 7! T7 </Td> <Td> 2014 </Td> <Td> Champions Tour </Td> <Td> Dick's Sporting Goods Open </Td> <Td> </Td> </Tr> <Tr> <Td> Ravano, Nicolo Nicolo Ravano </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 2 / 3 </Td> <Td> </Td> <Td> 2016 </Td> <Td> Challenge Tour </Td> <Td> Fred Olsen Challenge de España </Td> <Td> </Td> </Tr> <Tr> <Td> Thomas, Justin Justin Thomas </Td> <Td> 59 </Td> <Td> − 11 </Td> <Td> 1 / 4 </Td> <Td> </Td> <Td> 2017 </Td> <Td> PGA Tour </Td> <Td> Sony Open in Hawaii </Td> <Td> </Td> </Tr> <Tr> <Td> Hadwin, Adam Adam Hadwin </Td> <Td> 59 </Td> <Td> − 13 </Td> <Td> 3 / 4 </Td> <Td> </Td> <Td> 2017 </Td> <Td> PGA Tour </Td> <Td> CareerBuilder Challenge </Td> <Td> </Td> </Tr> <Tr> <Td> Saunders, Sam Sam Saunders </Td> <Td> 59 </Td> <Td> − 12 </Td> <Td> 1 / 4 </Td> <Td> T2 </Td> <Td> 2017 </Td> <Td> Web.com Tour (Finals) </Td> <Td> Web.com Tour Championship </Td> <Td> </Td> </Tr> </Table>

Who has shot a 59 on the pga