The lowest 18 hole score in relation to par at The Open is -9 and currently held by two players: Paul Broadhurst, 3rd round in 1990 and Rory McIlroy, 1st round in 2010.
The 1990 and the 2010 Open were both held at the Old Course in St Andrew.
The 1990 winner was Nick Faldo with a total score of -18.
The 2010 Open winner was Louis Oosthuizen with a total score of -16.
Updated: 9-Jul-2022 | Email feedback to this question
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