Jordan Spieth was teeing off on the par-4 13th. Patrick Cantlay was putting for birdie on the par-4 15th. There was no reason for one shot to affect the other, but that's what happened as Spieth's errant drive hit a cart path, bounded onto the 15th green and rolled past Cantlay, just after he made his stroke.

A bewildered Cantlay missed his effort to go 2 up in his match against Brian Harman. Meanwhile, Spieth was able to get a drop in the rough on the 13th and hit his second shot safely onto the green. He halved the hole to remain 3 up on Matthew Fitzpatrick.