Train Wrecks of 2011

1 of 10 Robert Beck/SI
Rory McIlroy, Masters: McIlroy began the final round with a four-shot lead but suffered a demoralizing collapse on Sunday at Augusta. After a one-over 37 on the front nine, he triple bogeyed the 10th on the way to a 43 on the back. The final-round 80 left him tied for 15th, 10 shots behind champion Charl Schwartzel.
2 of 10 Eric Gay/AP
Kevin Na, Valero Texas Open: Na's 16 on the ninth hole during the first round set the PGA Tour record for the worst score on a par 4. According to the AP, his disaster "included an unplayable lie from the tee, a two-stroke penalty after the ball ricocheted off a tree and struck him, and five consecutive strokes from the woods."
3 of 10 Paul Miller/EPA
John Daly, Australian Open: Daly hit seven balls in the water on the par-5 11th hole at the Australian Open and walked off the course. Already upset after hitting the wrong ball out of a bunker on the 10th, Daly fired shot after shot into a pond before quitting. He later tweeted: "when u run out of balls u run out of balls."
4 of 10 David Callow/AP
Robert Allenby, Presidents Cup: After going 0-3 in team matches, Allenby faced David Toms in the Sunday singles. He made six bogeys and one birdie and lost, 7 and 5. His disastrous Cup was capped by a beef with fellow Australian Geoff Ogilvy, which almost led to a fistfight the next week at the Australian PGA.
5 of 10 Robert Beck/SI
Tiger Woods, PGA Championship: After missing the U.S. Open and British Open due to injuries, Woods made his much-anticipated return to major championship golf at Atlanta Athletic Club. He looked lost, shooting 77-73 with five double bogeys over two days, and he missed the cut at a major for just the fourth time in his career.
6 of 10 Fred Vuich/SI
Phil Mickelson, British Open: Mickelson shot 30 on the front nine Sunday at Royal St. George's and briefly tied for the lead before his putter let him down. He lipped out a two-footer at the 11th and bogeyed four of his last eight holes to lose by three shots to Darren Clarke.
7 of 10 Matt Sullivan/Reuters
Jason Dufner, PGA Championship: On the 15th tee, Dufner was four shots ahead of the field and five shots ahead of Keegan Bradley, who had just made a triple-bogey six at the 15th. Dufner made bogeys at 15, 16 and 17 before losing a three-hole playoff to Bradley.
8 of 10 Gregory Bull/AP
John Daly, John Deere Classic: Daly's 13 on the par-4 fourth during the second round started with a drive into deep grass: "I hit it a couple times and then took an unplayable, couldn't get it out, hit it again, took an unplayable, couldn't get it out," Daly said. "Then I got it far enough left that I could drop, and then get in the bunker and two-putted for a 13."
9 of 10 Brandon Malone/Reuters
Tiger Woods and Steve Stricker, Thursday Foursomes, Presidents Cup: After going undefeated as a team at the 2009 Presidents Cup, Woods and Stricker were routed by Adam Scott and K.J. Choi, 7 and 6, in the first alternate-shot session of 2011. They made three bogeys, no birdies and failed to win a single hole.
10 of 10 Cathleen Allison/AP
Pat Perez, Reno-Tahoe Open: Perez missed three putts inside 10 feet on the last three holes and lost by one to Scott Piercy. Incensed, Perez walked off in a huff and blew past a kid looking for an autograph. It was captured on video, and Perez was widely criticized, but Perez later found the boy, apologized and gave him a gift.