ARDMORE, Pa. -- Phil Mickelson is 18 holes away from winning his first U.S. Open. But the names who hope to chase him down at Merion include a major winner (Charl Schwartzel), a former No. 1 (Luke Donald), World Golf Championships winners (Hunter Mahan and Justin Rose) and one of the PGA TOUR's best putters and most consistent players (Steve Stricker).
It also includes three players in their 20s -- Billy Horschel, Jason Day and Rickie Fowler -- who are eager to continue the trend of 20somethings winning the U.S. Open.
So how will it play out today? Fill out the form below and give us your thoughts.