Rory McIlroy has given up the Masters lead with a triple-bogey at the 10th hole.
After leading for three rounds, the 21-year-old got off to a shaky start, making the turn at 1-over 37. Still, he had a one-shot lead as he stepped to the 10th tee.
That's where it all unraveled. He pulled his tee shot into the trees left of the fairway, and the ball apparently ricocheted between two of the club's famous cabins. McIlroy had no choice but to punch it back out, but he still had a long shot to the green.
He yanked it left of the green, near a scoreboard, then banged a wedge off a tree limb. He finally chipped it onto the green - barely. Two putts left him with a 7, and sent him tumbling down the leaderboard.
THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.
AUGUSTA, Ga. (AP) - Tiger Woods had all the familiar body language from his glory days.
Fist pumps. A swag of the shoulders. The shuffle step to collect the ball out of the cup.
Woods made a stunning front-nine charge on the first day of the Masters, making the turn with a 5-under 31 to tie for the lead with Rory McIlroy and Charl Schwartzel.
Woods started Sunday a daunting seven shots off the lead, but he wiped out that deficit before he went to the back side at Augusta National. He made four birdies, a 10-footer for eagle at No. 8 and a brilliant up-and-down out of the bunker to save par at the ninth after driving onto the pine straw.
Far beyond the golf course, the nation was caught up in Tigermania, bombarding Twitter with messages about Woods' comeback.
"Tiger is back!!!" wrote receiver A.J. Green, expected to be one of the top picks in the NFL draft.
"Happy Sunday Everyone! Looks like my guy (at)TigerWoods has got that killer instinct back! Watch out golf world," New York Jets receiver Braylon Edwards said.
"About to watch the run-in to the Masters.. come on Tiger!!!" U.S. soccer player Stuart Holden wrote from England, where he plays in the Premier League.
The 21-year-old McIlroy had a four-shot lead on the field coming into the round, but he got off to a very shaky start. Suddenly showing his youth and a balky putter, he missed three par putts no longer than 5 feet, and was fortunate to save par at the par-5 second hole after landing in two different bunkers.
Schwartzel, one of four players tied for second at the start of the round, made an early charge, as well. He chipped in for birdie out of the second cut at No. 1, then holed out a wedge from the fairway for an eagle at the third, the shortest par-4 on the course.
McIlroy finally steadied himself a bit, reclaiming the lead with a birdie on the seventh to get back to 11 under. But there were seven players within three strokes of the lead in what shaped up to be a memorable back nine at Augusta.
Woods and Schwartzel were at 10 under. Angel Cabrera, K.J. Choi and Adam Scott were two shots back. Luke Donald and Jason Day were 8 under.