McIlroy, looking confident, held a four-stroke lead heading into Sunday's final round but self-destructed on the back nine.
Golf: Tiger Woods took home his 75th PGA Tour event win Monday at Torrey Pines with a four-stroke win.
The BR500's four-stroke engine is five times cleaner than the standard two-stroke models.
For years he had contemplated the inefficiencies of the traditional four-stroke Otto cycle engine (named for its 1876 developer, Nikolaus A. Otto).
EcoMotors and Achates are developing two-stroke, opposed piston diesel engines while Pinnacle is working on a four-stroke opposed piston gasoline engine.
FORBES: Engine Startup EcoMotors Signs Deal with Chinese Manufacturer
Conventional four-stroke engines produce power by moving a piston up and down using rapid explosions of fuel and air in a cylindrical chamber.
FORBES: How to get 51mpg from an engine the size of a large turkey.
Known for its four-stroke 90-degree V-twin engines and its unique valve design, Ducati has carved out an impressive racing record, highlighted by its 2007 Grand Prix World Championship win.
But having sought an explanation from Woods, the Augusta National rules committee, who described him as "very forthright" and "honest, " concluded that the four-time Masters champion should incur a two-stroke penalty.
CNN: Cabrera, Snedeker lead Masters heading into final round
They found that women with once-a-week-migraines with auras -- who made up 5 percent of the women with migraines -- were four times as likely to have had a stroke during the 12-year study as women without migraines.
CNN: Women's migraines linked to higher stroke, heart attack risk
Cattermole almost made it four on the stroke of half-time but his fierce strike from a neat Agbonlahor lay-off flew just over.
Joint leader with England's Nick Dougherty and Spaniard Garrido with a round to play, the 2008 Challenge Tour graduate did not drop a stroke in shooting a four- under-par 67.
But the real body blow for West Indies was the loss of Nash, whose four-and-a-quarter-hour innings ended disappointingly when he offered no stroke to a ball from Bollinger and lost his off stump.
BBC: Australia on brink of victory over West Indies in Perth
Cink is looking for his first victory since the 2009 British Open, but he and Haas were just one shot ahead of a group of four players -- and another nine were a stroke further back, including former major winners Louis Oosthuizen, Angel Cabrera and Keegan Bradley plus ex-world No. 1 Lee Westwood.
They hold a two-stroke advantage over a group of four players on 12 under that includes France's Raphael Jacquelin, and Chile's Felipe Aguilar.
It also contains Topol's response, in which he publishes a new analysis of four-year-old data that he says shows a "significant" increase in heart attack and stroke in patients taking Vioxx after as little as six weeks.
The world number three has finished in the top three in three of the last four majors, including missing the play-off by one stroke last year.
In an unpublished study of post-stroke patients, Dr. Bastian and collaborators showed that four weeks of split-belt treadmill training led to improved walking gait for three months.
Liechtenstein nearly made Wales pay on the stroke of half-time, exposing a shaky Wales back four where Collins again showed a worrying tendency to over-commit.
He was four minutes late -- one minute away from disqualification -- and picked up a two-stroke penalty before triple-bogeying his first hole.
McDowell dropped four shots from the ninth, including a bogey at the short 17th, but took a one-stroke lead down the par-five last.
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