Let's be honest. Who knew who this young man was? He turned pro in 2007, won his first tournament in 2011, his second early this year and his third tournament in the Deutsche Bank Championship.
Now he's No. 1 in the FedEx Cup standings where Hunter Mahan was a week ago after his win in The Barclays. Mahan shrunk from the top, but Kirk filled the void.
Looking over the entire weekend, there were moments of brilliance from a number of golfers, whether it was Ryan Palmer's putting on Friday or Rory McIlroy's world-conquering play on Sunday (matched, under-reportedly, by Kirk).
It's on to Cherry Hill for the BMW Championship for the third leg of the FedEx Cup playoffs. Before that, let's take a look at the winners and losers from the DBC.