Jordan Spieth leads on -14
His total of 130 shots is lowest ever at halfway stage
Charley Hoffman second on -9; Dustin Johnson -7
England's Justin Rose & Paul Casey -7
Rory McIlroy -2; Tiger Woods -2
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Image source, EPABack at 15, here's Mickelson's chip... decent, should make a bird from there. Casey on 18... rasps one down the middle, that's a beauty. McIlroy for eagle on 15... great weight and he'll pop that in for birdie, he's back to level and two within the cut line.
Image source, APThe almost unrecognisable Jason Dufner - he's done about 25lb in the last few months - will be here for the weekend, he's +1. Here's Crenshaw - go on, mate, stick it in... leaves it a shade left, taps it in, an era comes to an end. Enter Carl Jackson, his caddie since 1976 - big hugs, buckets of tears, chairman Billy Payne also makes an appearance. It's difficult to comprehend, really, what it must be like for so many years of Augusta memories to come to an end.
Image source, Ian PoulterIan Poulter is one over for the tournament.
Iain Carter
BBC golf correspondent on Radio 5 live sports extra
"Great scenes at the 18th. Ben Crenshaw has just taken his cap from his silver hair and acknowledged brilliant scenes. Barely a dry eye in the house. A hugely popular figure in American golf."
Image source, ReutersHere's Bren Crenshaw coming up the last for the final time. His caddie since 1976, Carl Jackson, awaits him behind the 18th green - he's been battling cancer of late so was too ill to carry Ben's bags this week, except in the par-three. There'll be a few tears shed this evening and a few beers shared before they head down Magnolia Lane and into Augusta history. Crenshaw with a fine pitch on, off comes the cap, the patrons rise, lovely stuff.
Image source, APCasey into the 17th and his ball just clings on. Here's Mickelson at 15, a five wood in his mitts, and he's tugged it long and left. That said, you'd back him to get up and down from there for birdie. McIlroy playing from bang middle and he's safely on in two.
Image source, APMcIlroy takes out his frustrations on the tee at 15, he could do with an eagle here, just to get rid of the weekend jitters. Schwartzel of South Africa, winner when McIlroy melted down in 2011, birdies 15 and is four under.
Image source, Getty ImagesPar for Mickelson at 14 after some smart scrambling. That's poor from Rory, however, from no more than a few feet, he drops back to +1 and is flirting with the cut line once again. Casey lets rip at 17, great to see him finding some of that old magic.
Image source, APOld Ben Crenshaw is still poking it round there, he's got two more holes to go. Crenshaw made his Masters debut in 1972 and has won it twice, in 1984 and 1995. It's all a bit of a struggle nowadays, however, which is why it's his last appearance - he's 30 over but this course will never take his dignity.
Image source, Getty ImagesMcIlroy from the first cut at 14, that's solid enough. Scott makes bogey five at the last for a 69 - but that leaves him 11 behind leader Spieth. Dustin for par at the last, from six feet... starts left and stays left. The big-hitting American is in with a 67 for seven under, third overall and seven off the lead. Three eagles in that round, seven under for the par fives, a Masters record.
Stunning Spieth, smiling Tiger and Wayne Gretzky. Check out our BBC Sport Facebook gallery from day two of the Masters., external
Image source, EPAAdam Scott, champion in 2013, birdies 17 and is now four under. Johnson with a cute chip over the bunker at 18, should make his par. Casey pulls his tee shot at 16, a lot of work to do from there. Scott has chipped into a bunker at 18 - clears his grooves, as if that was the problem. Mickelson preparing some magic, he needs to come up with a banana shot round the trees and into the 14th green.
Image source, EPAPar at the last for Rose, a round of 70, seven under and tied for fourth with fellow Englishman Paul Casey, who has just birdied 15.
Image source, APBubba in with a 71 for two under overall. Dustin made par at 17 and here he is at 18... not good, he's dumped it in the jungle. Birdie at 13 for Mickelson, he's now -4, good to see Lefty finding a bit of form. Rory taps in for eagle, that takes him back to level and three inside the projected cut.
Image source, Getty ImagesRose at 18, into the heart of the green, birdie chance. McIlroy at 13 after that monster drive and he's got no more than an eight iron in his mitts - corker, leaves himself a two-footer for eagle.
Image source, Getty ImagesDustin's second into 17... looks like it's going to race through but suddenly grips on the fringe. Bill Haas going great guns, he's birdied 15 to get to -4. Bill's dad, Jay, finished third at the Masters behind Ben Crenshaw in 1995.
Image source, Getty ImagesMickelson on tee at 13, he made birdie on 11 to get to -3. That's a pearler, a perfect left-handed fade around the corner. McIlroy flies the trees, doesn't even need to draw it. Rose on the 18th and he slams one down the right side of the fairway. Westwood in with a 73, he's two over and will be here for the next two days.
Image source, Getty ImagesCasey misses that birdie putt at 14 and leaves himself a tricky one coming back. Matsuyama, too, hits it too hard and will stay three under. Casey remains six under and eight off the lead.
Image source, ReutersWhen Dustin hits a golf ball it stays hit and begs never to be hit again - monsters one down the 17th and the 18th is in giving mood today. Casey all over the flag at 14, chance to get to seven under...
Andrew Magee
American PGA Tour winner on BBC Radio 5 live sports extra
"That double bogey on the first must have rattled Dustin Johnson's cage. He must have decided he will have to free-wheel it and has just decided, having seen where Jordan Spieth is, he has to go for it and he is doing just that."