The American beat Tom Watson in a playoff at Turnberry in 2009
2 Todd Hamilton: Unknown American who triumphed at Troon in 2004, but slipped to 976th in the rankings.
3 Ben Curtis: Equally unknown American who won at Royal St George's in 2003.
4 Paul Lawrie: After Jean van de Velde blew a three-shot lead, the unfancied Scot won the playoff in 1999.
5 Ian Baker-Finch: The Australian won the tournament in 1991 and retired from golf six years later.
6 Justin Leonard: The Texan was a relative unknown when he won the Open at Troon in 1997.
7 Bill Rogers: Former American Air Force colonel won the 1981 tournament at Royal St George's.
8 Louis Oosthuizen: The South African has shot up the rankings since winning in 2010 at St Andrews.
9 Darren Clarke: Irish journeyman thought his best days were behind him when he won in 2011.
10 Roberto De Vicenzo: The Argentinian was a surprise winner at Hoylake in 1967.