Earned his fourth U.S. Open start by getting inside the top 60 of the Official World Golf Ranking on June 10. It is the second consecutive year Grillo earned this exemption on the final cutoff date for the OWGR. Grillo registered his first PGA Tour victory in his eighth career start and first as a Tour member when he won the Frys.com Open in October of 2015, two weeks after winning the Web.com Tour Championship. He turned pro in 2011 and immediately earned status on the European Tour, posting a top-10 finish in his first start, the 2012 Africa Open. Represented Argentina in the World Amateur Team Championship in 2008 and 2010.
|2018||Shinnecock Hills Golf Club||76-73||+9||MC|
|2016||Oakmont Country Club||73-70-75-75--293||+13||T-54|