Great round so far by American Rickie Fowler, who is five under for the day with two holes to play.
It's been a while since we mentioned Stephen Gallacher, so we shall rectify that tout suite with an update. The Scotsman is sadly not shining so far and is two over after a nightmarish double bogey on the 4th. He is currently on the 8th and increasingly in need of a morale-boosting birdie.
Matt Kuchar birdies the 9th to complete the front nine three under and move himself into a tie for third. Watson pars the third to stay eight under and in regal isolation for now from the chasing pack.
Rory McIlroy on the google box and insisting anything under 68/69 today is going to be the exception to the rule. Which puts Jimenez's glorious 66 into a bit more context.
By the way, Gary Woodland hit a superb 69 earlier today to leave himself on evens after three rounds.
Watson drops a shot on the par three 4th and his round so far has been anything boring. Unless you'd call an eagle and two birdies in four holes boring.
Fowler and Poulter have both just finished their rounds. Fowler shoots an impressive 67 to head to the locker room three under while Poults cards a creditable two under to end the third day even stevens.
Breaking news. Sweden's Jonas Blixt birdies the 5th to go four under and into second place on the leader board all on his lonesome.
Speaking of the leader board, here it is. The eagle eyed among you will notice Spieth has just birdied 6 to join our old pal Blixt in second.
-4 Blixt, Spieth
-3 Jimenez, Fowler, Kuchar, Stadler, Furyk, Bjorn, Senden
Westwood underhits birdie putt on the 12th. If he'd ad sunk that one, it would have put him just five off the lead. A shame because he picked the line perfectly but just didn't give it enough welly.
Par for Watson on the fifth but Senden drops a shot to slip back to two under.
More movement and while it might not be tectonic, it's significant. Bjorn birdies the 6th and joins Blixt and Spieth on four under. Watson now has a trio of player attempting to hunt him down.
Blooming hell. Rose drops a shot on 17th to go back to one under.
Watson drops another shot on the 6th. It's his first three putt of the tournament and with our trio on four under and Watson falling back to six under, things are starting to close up.
"I am still in a position to have a run at the guys tomorrow but I should have been a lot closer. We will have to see what Bubba does out there."
Senden isn't exactly mounting a charge after finishing four under for the first two rounds. He's two over for the day after six and the Aussie is evidently struggling.
Watson finds the bunker from the tee on the 7th.
Justin Rose finishes with a par on the 18th for a pretty satisfying round of 69. It leaves him one under and he will at least be amongst the top 10/15 players starting on Sunday.
Health & safety rules state I must take a five-minute break at this stage of proceedings lest my fingers become permanently cramped and damaged. Obviously I'd rather plough on through but rules is rules...
Ok, fingers refreshed and fully operational. For the moment at least Watson is in freefall. His fourth bogey of the day on 7th leaves him at five under and the lead is down to a solitary one shot. Who's going to make a move?
And yes, I am aware my scheduled break was six rather than the permitted five minutes but I won't tell if you won't...
More woe for Scotland's Gallacher. Three consecutive double bogeys on 9, 10, 11 see him tumble to eight over for the day and he's probably wishing Augusta would open up and swallow him right now.
It's not a great day for Jamie Donaldson either. The Welshman is three over for the day after 12.
I haven't mentioned the old stager that is Jim Furyk yet. He's one under today, three under in total and very much in contention at this stage. He's finished fourth in the Masters twice previously you know.
Big news. Bjorn and Blixt both birdie the 9th to go five under and we suddenly have a three way for the lead.
Westwood birdies the 15th to go three under and he's in with a shout. He was second at Augusta in 2010 but now has a genuine chance of ending his Majors near miss misery.
More movement as Kuchar birdies the 14th to join Spieth on four under. Things have suddenly become extremely fluid at the top.
Senden goes agonisingy close to an eagle two on the 9th but still has a gimme for a much-needed birdie.