What were you doing aged 18? Playing in an Open? Thought not. Amateur Matthew Fitzpatrick is on one under after three pars and a birdie. Splendid.
Agony is over for Justin Rose as he taps in for a 75. Ernie Els wraps up a 74 with a triple bogey, birdie and bogey. Not a great start for the defending champ.
BOOM on the first tee as Scott, Kuchar and Donald are off and all look in good spirits as they head off to their balls.
Mark O'Meara is having a blistering afternoon. The 1998 Open champ has carded four pars and four birdies. That is hot business. -4 and flying.
Mickelson is also rampant. One bogey at the 8th but four birdies have go Leftie onto three under after 16. This is your dangerman.
Amateur Matthew Fitzpatrick has just bagged another birdie. Two under after five. Incredible.
The 2011 Open champ Darren Clarke has produced a mixed bag so far. Two pars, bogey and a birdie in his first four holes. Level par.
Scott, Kuchar, Garcia all start with pars but no so good news for Luke Donald who bangs in an opening bogey.
For the definition of stinky back nine please see Ian Poulter's card. Four pars after the turn, then four bogeys and a birdie to finish on +1. Still in it but that's a shocking finish and that'll play heavily inside that busy head of his on the pillow tonight.
There's a man prowling through the Muirfield portakabins. 10 minutes from teeing off for a geezer called Tiger.
Mark O'bloomin Meara. Incredible scenes. This could turn out to be the greatest round of golf ever. Nine holes. Four pars. Five birdies. 31 shots. Cripes. I do that in three holes. And he's sharing the lead with Zach Johnson on -5.
Thoughts on Tiger everybody? Can the world no 1 make his mark at Muirfield?
Tiger at the first tee. The word that springs to mind is WILD. He flies left, hits a tree and bounces back towards the fairway but slap in the middle of the long stuff. Scratchy first shot.
WOOOP WOOOP. Tiger had some dropping options and he plays his ball from the rough, slaps his blade through the rough, lifts his front leg and smacks his like a drunken cricket shot. Back on track though.
"Some stupid mental errors I shouldn't be making" says Rory McIlroy after his 79. More to follow.
Phil Mickelson comes off the course with a 69 and says he feels lucky to have played in the early groups. On the hot and dry conditions, Leftie says: "Half of the greens are dead".
Trousers flapping, Zach Johnson gets down to tap in a shortie and finishes up with a brilliant 66. In the clubhouse, top of the leaderboard and what a fab day for the American. Four birdies, one eagle. Anybody know any other Zachs? Great name.
Mark O'Meara has begun in steady fashion on the back nine with bogey and two pars. He's on -4.
Americans filling six of the top nine spots on the leaderboard. Who would have thought 18-year-old amateur Matthew Fitzpatrick would be the highest-placed Brit sitting in 10th at -2.
Westwood - one birdie and three pars. Garcia also on one under. Hunter Mahan grabs a birdie after three pars - he's also on one under.
Woods settles the ship and pars the second. +1
Angel Cabrera high-fives his son and caddie as a bogey ends his useful round of 69.