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Webb Simpson

Jason Day rallies from bout of vertigo to share lead at U.S. Open

There were questions about whether or not Jason Day would even play in Saturday's third round of the U.S. Open. Now the only question is if he'll have enough to win it all.

The 27-year-old Australian collapsed Friday on the ninth hole because of an attack of vertigo. He finished the round, and 36 holes into the 115th U.S. Open at Chambers Bay, he sat at two-under with a chance to win his first major.

On Saturday, Day collected six birdies, five on the back nine, to climb up the leaderboard and join Dustin Johnson, Jordan Spieth and Branden Grace for a view from the top.

Day's caddie, Colin Swatton, said his comeback on Saturday was "a superhuman...