U.S. Open 2013: Rounds 1 and 2 (groupings and starting times)
Note: All times in Eastern Standard Time (Thursday, tee 1/Friday, tee 11)
1. Cliff Kresge, Roger Tambellini, Ryan Yip: 06:45 a.m./12:45 p.m.
2. Rikard Karlberg, Yui Ueda, John Parry: 06:56 a.m./12:56 p.m.
3. Nick Watney, Peter Hanson, Hunter Mahan: 07:07 a.m./01:07 p.m.
4. Lucas Glover, Paul Casey, Bill Haas: 07:18 a.m./01:18 p.m.
5. Aaron Baddeley, Rory Sabbatini, David Lingmerth: 07:29 a.m./01:29 p.m.
6. George Coetzee, Martin Laird, Marcel Siem: 07:40 a.m./01:40 p.m.
7. Jerry Kelly, Charley Hoffman, John Huh: 07:51 a.m./01:51 p.m.
8. Henrik Stenson, Ryan Moore, Robert Garrigus: 08:02 a.m./02:02 p.m.
9. Ryan Palmer, Simon Khan, Ted Potter Jr.: 08:13 a.m./02:13 p.m.
10. Shawn Stefani, Michael Kim, Nicholas Thompson: 08:24 a.m./02:24 p.m.
11. Chris Doak, Andrew Svoboda, Douglas LaBelle II: 08:35 a.m./02:35 p.m.
12. Kevin Sutherland, Matt Weibring, Randall Hutchison: 08:46 a.m./02:46 p.m.
13. Cory McElyea, Ryan Nelson, John Hahn: 08:57 a.m./02:57 p.m.
14. David Toms, Darren Clarke, Jose Maria Olazabal: 12:30 p.m./07:00 a.m.
15. Geoff Ogilvy, Angel Cabrera, Paul Lawrie: 12:41 p.m./07:11 a.m.
16. Luke Donald, Lee Westwood, Martin Kaymer: 12:52 p.m./07:22 a.m.
17. Jim Furyk, Graeme McDowell, Zach Johnson: 01:03 p.m./07:33 a.m.
18. Tiger Woods, Rory McIlroy, Adam Scott: 01:14 p.m./07:44 a.m.
19. Thongchai Jaidee. G. Fernandez-Castano, Thorbjorn Olesen: 01:25 p.m./07:55 a.m.
20. Webb Simpson, Steven Fox, Ernie Els: 01:36 p.m./08:06 a.m.
21. Kyle Stanley, Joe Ogilvi, Luke Guthrie: 01:47 p.m./08:17 a.m.
22. Josh Teater, Yoshinobu Tsukada, Eddie Pepperell: 01:58 p.m./08:28 a.m.
23. Edward Loar, Morten Orum Madsen, Jung-Gon Hwang: 02:09 p.m./08:39 a.m.
24. Max Homa, Russell Knox, Matt Bettencourt: 02:20 p.m./08:50 a.m.
25. Adam Hadwin, John Nieporte, Jim Herman: 02:31 p.m./09:01 a.m.
26. Brandon Brown, Grayson Murray, Jesse Smith: 02:42 p.m./09:12 a.m.
27. Bubba Watson, Dustin Johnson, Nicolas Colsaerts: 07:00 a.m./12:30 p.m.
28. Phil Mickelson, Steve Stricker, Keegan Bradley: 07:11 a.m./12:41 p.m.
29. Matt Kuchar, Justin Rose, Brandt Snedeker: 07:22 a.m./12:52 p.m.
30. Louis Oosthuizen, Charl Schwartzel, Tim Clark: 07:33 a.m./01:03 p.m.
31. Sergio Garcia, Stewart Cink, Padraig Harrington: 07:44 a.m./01:14 p.m.
32. Ian Poulter, Jason Dufner, Boo Weekley: 07:55 a.m./01:25 p.m.
33. Rickie Fowler, Matteo Manassero, Jason Day: 08:06 a.m./01:36 p.m.
34. Y.E. Yang, Fredrik Jacobson, Hiroyuki Fujita: 08:17 a.m./01:47 p.m.
35. Scott Stallings, John Peterson, Robert Karlsson: 08:28 a.m./01:58 p.m.
36. Jay Don Blake, Brandt Jobe, Michael Campbell: 08:39 a.m./02:09 p.m.
37. David Hearn, Mike Weir, Jaco Van Zyl: 08:50 a.m./02:20 p.m.
38. Kevin Phelan, Wil Collins, Harold Varner III: 09:01 a.m./02:31 p.m.
39. Cheng-Tsung Pan, Mackenzie Hughes, Geoffrey Sisk: 09:12 a.m./02:42 p.m.
40. Justin Hicks, David Howell, Brian Stuard: 12:45 p.m./06:45 a.m.
41. Brendan Steele, Estanislao Goya, Peter Hedblom: 12:56 p.m./06:56 a.m.
42. Marc Leishman, John Senden, Marcus Fraser: 01:07 p.m./07:07 a.m.
43. Scott Langley, Chris Williams, Morgan Hoffmann: 01:18 p.m/07:18 a.m.
44. Michael Thompson, Michael Weaver, Casey Wittenberg: 01:29 p.m./07:29 a.m.
45. K.J. Choi, Francesco Molinari, Carl Pettersson: 01:40 p.m./07:40 a.m.
46. Scott Piercy, Kevin Chappell, Jamie Donaldson: 01:51 p.m./07:51 a.m.
47. Bo Van Pelt, Kevin Streelman, D.A. Points: 02:02 p.m./08:02 a.m.
48. Branden Grace, Sang-Moon Bae, Russell Henley: 02:13 p.m./08:13 a.m.
49. Hideki Matsuyama, Billy Horschel, Jordan Spieth: 02:24 p.m./08:24 a.m.
50. Mathew Goggin, Steven Alker, Alistair Presnell: 02:35 p.m./08:35 a.m.
51. Matt Harmon, Gavin Hall, Bio Kim: 02:46 p.m./08:46 a.m.
52. Zack Fischer, Ryan Sullivan, Brandon Crick: 02:57 p.m./08:57 a.m.
2013 U.S. Open date: June 13-16
U.S. Open location: Merion Golf Club, Ardmore, Pa.