AUGUSTA, Ga. — The final round at Augusta National Golf Club was shaping up as a victory lap for Jordan Spieth, who was four strokes clear of the field through 16 holes of his third round at the Masters on Saturday.
For more than three hours, Spieth, the reigning champion, had battled gusting winds and his swing to piece together a two-under-par score. Just when it looked as if he was crafting a sequel to the four-stroke lead he held after 54 holes last year, Spieth lost track of the plot. He hit wayward tee shots at Nos.