But his memory lapse is nothing compared to some real golfing howlers.
Ian Woosnam will be haunted by the discovery of an illegal 15th club in his bag, left there by hapless caddie Miles Byrne, which possibly cost the little Welshman victory in the 2001 Open after he incurred a two-stroke penalty.
And here at Augusta, Roberto de Vincenzo might have won the 1968 Masters had he not signed for a final round 66 rather than his score of 65.