BMW Championship 2015 PGA Tour Jordan Spieth

1 of 24 Getty Images

Jason Day

Jason Day of Australia reacts after putting for birdie on the 18th green during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.

2 of 24 Getty Images

Rory McIlroy

Rory McIlroy of Northern Ireland plays his shot from the fourth tee during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.

3 of 24 Getty Images

Jordan Spieth

Jordan Spieth (L) talks to Justin Thomas on the second green during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.

4 of 24 Getty Images

Scott Piercy

Scott Piercy plays a shot on the 16th hole during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.

5 of 24 Getty

Dustin Johnson

Dustin Johnson plays his shot from the fourth tee during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.

6 of 24 Getty Images

Daniel Berger

Daniel Berger reacts to a missed putt on the eighth green during the Third Round of the BMW Championship at Conway Farms Golf Club on September 19, 2015 in Lake Forest, Illinois.