WATCH: Day's hole-in-one overshadows fellow Aussie's blitz
MARC Leishman is leading the BMW Championship after two rounds, but it was the exploits of fellow Australian Jason Day that stole the headlines at Conway Farms in Chicago.
Day shot a hole-in-one on the par-three 17th on his way to a six-under 65, which has him tied with American Rickie Fowler for second spot.
Leishman shot a 64 to go with his opening-round 62 and is at 16-under, three shots ahead of Day and Fowler.
Day admitted it had been a while since his last ace.
"My last hole-in-one was at Turning Stone in 2008, so I've had a bit of a dry spell," he said.
Day will donate the BMW M760i he won for his hole-in-one to a foundation that provides college scholarships to caddies, while BMW will also donate $US100,000 to the cause.
The BMW Championship is the second last event in the lucrative FedEx Cup series. The top-five seeds after the event are in contention to win a $US10 million bonus prize if they win the series-ending Tour Championship in Atlanta.