11 reactions | One of the unique features of Blackwolf Run, site of this week's U.S. Women's Open, is the fact that the 9th and 18th holes actually share a putting surface. Additionally, there is an alternate putting green that could come into play at the end of the 9th fairway. As the first players begin to approach those greens this morning, we look to the USGA's Thomas Pagel to explain to us the rules in those situations: | United States Golf Association - USGA | Facebook