Aussie Day 20-under in historic PGA win over Spieth

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Jason Day of Australia celebrates with the Wanamaker trophy after winning the 2015 PGA Championship with a score of 20-under par at Whistling Straits on August 16, 2015Kohler (United States) (AFP) - Australia's Jason Day won the PGA Championship in historic style on Sunday, capturing his first grand slam title with a 20-under par total unprecedented in major championship history.

Day carded a five-under par 67 in the final round at Whistling Straits for a 20-under total of 268 -- breaking Tiger Woods's major-record low winning total of 19-under set at the British Open in 2000.

Day, who has endured a string of near-misses on golf's biggest stages, was never going to let this one…