Sion Bebb failed in his bid to qualify from the Sunningdale field after his overall three-under par score meant the Welshman was tied 21st in international final qualifying.
According to the Duckworth-Lewis method, the "par" score was 229, which meant the honours and the points were shared.
West Indies were ahead of the "par" score under the Duckworth-Lewis system when the 47th over began - and the umpires hovered over their light meters.
It beat Schwartzel's 2010 record winning total and margin for the tournament of 261 and six shots respectively, and his score to par of -27 was the equal second lowest in European Tour history.
Four consecutive birdies on the back nine helped Edwards to a tournament record score of 19-under par.
It was the third successive match in which the Italians had failed to score after their below-par displays in the Confederations Cup.
His 13-under-par total beat the five-under score of second-place David Lynn of England and was nine better than four others: Justin Rose, Carl Pettersson, Ian Poulter and the defending champion, Keegan Bradley.
Donald's score of five-under-par for the last four holes also made sure he will be challenging Garcia, who admitted even he was shocked by how erratically he had played.
His score for the day was even-par 72.
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Dennis Watson's winning score at the 2007 Senior PGA Championship was nine-under par.
Daly still holds the tournament record for lowest score with his 2001 winning total of 27-under-par 261, but since then, organizers have thickened the Munich Eichenried rough to toughen up the course.
The world No.12 carded a torrid seven-over-par 79 on day one at the Muirfield Village Golf Club, his highest score in 43 rounds at the venue.
Woods' score could have been even better had he not dropped two strokes at the par-four 18th hole.
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