A look at some notable pairings and Thursday times:
Dustin Johnson, Nick Watney, Adam Scott 8:40am
(Butch Harmon coached group)
Rory McIlroy, Rickie Fowler, Jason Day 9:24am
(Young gun group)
Padraig Harrington, Ryo Ishikawa, Bill Haas 9:57 am
(Ishikawa donating all winnings to Japan)
Martin Kaymer, Lee Westwood, Matt Kuchar 10:19am
(#1, #2, #10 in the world rankings)
Hunter Mahan, Ernie Els, Francesco Molinari 10:30am
Tiger Woods, Graeme McDowell, Robert Allenby 10:41am
(Woods #7 in world rankings, McDowell #5)
Angel Cabrera, Ian Poulter, David Toms 11:47am
Fred Couples, Luke Donald, Steve Stricker 12:53pm
(Couples 1993 champ, Donald #3 in world, Stricker #8)
Phil Mickelson, Geoff Ogilvy, Peter Uihlein 1:48pm
(Mickelson defending champ and #3 in world, Uihlein U.S. Amateur champ)
