For a moment today, it looked like Spieth had put this thing in the history books, opening a 7-stroke lead after birdieing 15 and 16. But about fifteen minutes later, his lead was suddenly down to 4, after he double-bogeyed 17, and Justin Rose birdied 18. That's what can happen on this golf course, where there are plenty of birdie chances and also opportunities to blow up in a hurry.
It's Spieth and Rose in the final group at -16 and -12. In the group ahead of them are Phil Mickelson at -11 and Charley Hoffman at -10.