Jason Dufner is with the struggling crowd of golfers fighting for contention at Day 1 of the 2012 U.S. Open. Dufner, the Cleveland native most recently bogeyed on 12 and 16.

Michael Thompson leads the field with a 4-under par score of 66. A crowd of golfers are behind him at 1-under, a group that includes Tiger Woods and Rickie Fowler.

Reigning 2011 U.S. Open champion Rory McIlroy is struggling quite a bit, sitting at +4 through 14 holes. Phil Mickelson is has been the most disappointing story of the star players so far, having gone 6-over par with a score 76 in the first round.

For all your news, notes, updates and analysis throughout the 2012 U.S. Open at Olympic, make sure you stay tuned to this StoryStream and also visit SB Nation's dedicated golf hub. Be sure to head over to USOpen.com for even more coverage from the event.