Brian Harman's second ace of The Barclays final round came at the 228-yard 14th. Two in one round! Harman posted a 68.
To put in perspective how rare the feat is, Golf Central put together this graphic:
And in case you still can't believe it, here's how the scorecard looked...
According to Melissa Blanton at PGA.com, the last to record two aces in one round was Yusaku Miyazato at Reno in 2006. There's a Final Jeopardy stumper.