McIlroy went into the final round of the weather - affected event leading by three shots .
The world number three 's rally in the closing holes carried McIlroy to a closing 69 and victory by three strokes with a 12 - under par total .
McIlroy went into the final round of the weather - affected event leading by three shots , and the world number three 's rally in the closing holes carried him to a closing 69 and victory by three strokes with a 12 - under par total .