The first day of the 2012 U.S. Open on Thursday offered no shortage of surprises and established the early storylines for the remainder of the prestigious Grand Slam event. The Olympic Club in San Francisco has proved to be every bit as challenging a course as was anticipated with elite golfers such as Phil Mickelson and Bubba Watson having a devil of a time getting anything to go their way.

Meanwhile, odds-on favorite to win Tiger Woods had a very strong start to the tournament, finishing at 1-under to finish in a four-way tie for second place. Michael Thompson had the best start of anyone, finishing at 4-under to claim a three-stroke lead at the end of the first round.

The groupings will begin teeing off for the second round at 10:00 a.m. ET on Friday. All times below are Eastern.

First hole

10:15 a.m.: John Peterson, Morgan Hoffmann, Aaron Watkins
10:26 a.m.: Jeff Curl, Nicholas Thompson, Casey Wittenberg
10:37 a.m.: Soren Kjeldsen, Chez Reavie, Peter Lawrie
10:48 a.m.: Michael Campbell, Olin Browne, Joe Durant
10:59 a.m.: Bill Haas, Nick Watney, a-Jordan Spieth
11:10 a.m.: Martin Kaymer, Hunter Mahan, Justin Rose
11:21 a.m.: Steve Stricker, Ian Poulter, Matt Kuchar
11:32 a.m.: Jason Day, Louis Oosthuizen, Jason Dufner
11:43 a.m.: Rickie Fowler, Ryo Ishikawa, Dustin Johnson
11:54 a.m.: Hunter Haas, Tadahiro Takayama, Lee Slattery
12:05 p.m.: Alex Cejka, Kevin Chappell, Blake Adams
12:16 p.m.: James Hahn, Darron Stiles, Roberto Castro
12:27 p.m.: a-Brooks Koepka, Kyle Thompson, Samuel Osborne
3:45 p.m.: Shane Bertsch, Martin Flores, Tommy Biershenk
3:56 p.m.: Scott Piercy, Matthew Baldwin, Matt Bettencourt
4:07 p.m.: Thomas Bjorn, Kevin Na, Branden Grace
4:18 p.m.: Phil Mickelson, Tiger Woods,Bubba Watson
4:29 p.m.: Joe Ogilvie, Stephen Ames, Tim Herron
4:40 p.m.: Davis Love III, Padraig Harrington, David Toms
4:51 p.m.: Carl Pettersson, Charl Schwartzel, Charles Howell III
5:02 p.m.: Robert Karlsson, Bob Estes, Robert Rock
5:13 p.m.: K.J. Choi, Y.E. Yang, K.T. Kim
5:24 p.m.: Fredrik Jacobson, Robert Garrigus, Alexander Noren
5:35 p.m.: Gonzalo Fernandez-Castano, Bae Sang-moon, Rafael Cabrera-Bello
5:46 p.m.: Marc Warren, Anthony Summers, Michael Allen
5:57 p.m.: Hunter Hamrick, Tim Weinhart, Scott Smith

Ninth hole

10 a.m.: Casey Martin, a-Cameron Wilson, Dennis Miller
10:11 a.m.: Jim Herman, William Lunde, David Mathis
10:22 a.m.: Nicolas Colsaerts, Charlie Wi, Simon Dyson
10:33 a.m.: Alvaro Quiros, Gary Woodland, John Senden
10:44 a.m.: Rory McIlroy, Luke Donald, Lee Westwood
10:55 a.m.: Jim Furyk, Sergio Garcia, Graeme McDowell
11:06 a.m.: Stewart Cink, Trevor Immelman, Lucas Glover
11:17 a.m.: Ernie Els, Geoff Ogilvy, Angel Cabrera
11:28 a.m.: Martin Laird, Ben Crane,Anders Hansen
11:39 a.m.: Matteo Manassero, Aaron Baddeley, Miguel Angel Jimenez
11:50 a.m.: Brian Harman, Spencer Levin, Mikko Ilonen
12:01 p.m.: Brice Garnett, Justin Hicks, Jesse Mueller
12:12 p.m.: Brian Rowell, a-Alberto Sanchez, Brian Gaffney
3:30 p.m.: Scott Langley, Steve Lebrun, a-Beau Hossler,
3:41 p.m.: Jason Bohn, Raphael Jacquelin, J.B. Park
3:52 p.m.: Michael Thompson, Colt Knost, Steve Marino
4:03 p.m.: Brendan Jones, George Coetzee, Gregory Bourdy
4:14 p.m.: a-Patrick Cantlay, Jonathan Byrd, Kyle Stanley
4:25 p.m.: Retief Goosen, Vijay Singh, Zach Johnson
4:36 p.m.: a-Andy Zhang, Hiroyuki Fujita, Mark Wilson
4:47 p.m.: Adam Scott, Keegan Bradley, Webb Simpson
4:58 p.m.: Tim Clark, Toru Taniguchi, Rod Pampling
5:09 p.m.: Francesco Molinari Bo Van Pelt, Peter Hanson
5:20 p.m.: D.A. Points, Lee Dong-hwan, Kevin Streelman
5:31 p.m.: Edward Loar, Paul Claxton, Alistair Presnell
5:42 p.m.: Mark McCormick a-Nick Sherwood Cole Howard

You can find a full 2012 U.S. Open leaderboard at USOpen.com.

For all your news and updates in the run up to the 2012 U.S. Open at Olympic, visit SB Nation's dedicated golf hub. Be sure to head over to USOpen.com for even more coverage from the event.