Business_Finance

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Phil Mickelson smiles during a news conference at Farmers Insurance Open golf tournament at Torrey Pines Golf Course on Wednesday, Jan. 22, 2014, in San Diego. (AP Photo/Chris Carlson)

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Tiger Woods talks to the media during a news conference at the Farmers Insurance Open golf tournament at Torrey Pines Golf Course on Wednesday, Jan. 22, 2014, in San Diego. (AP Photo/Chris Carlson)

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Japanese pitcher Masahiro Tanaka arrives at the office of his baseball team the Rakuten Golden Eagles in Sendai, northeastern Japan, Thursday morning, Jan. 23, 2014. The New York Yankees capped an offseason spending spree by agreeing Wednesday, Jan. 22 to a $155 million, seven-year contract with prized 25-year-old right-hander Tanaka. (AP Photo/Kyodo News) JAPAN OUT, CREDIT MANDATORY

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Japanese pitcher Masahiro Tanaka, right, smiles as he runs with his teammate and pitcher Manabu Mima in the morning workout at the Rakuten Golden Eagles' indoor training facility in Sendai, northeastern Japan, Thursday morning, Jan. 23, 2014. The New York Yankees capped an offseason spending spree by agreeing Wednesday, Jan. 22 to a $155 million, seven-year contract with prized 25-year-old right-hander Tanaka. (AP Photo/Kyodo News) JAPAN OUT, CREDIT MANDATORY

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Japanese pitcher Masahiro Tanaka throws a ball during the morning workout at the Rakuten Golden Eagles' indoor training facility in Sendai, northeastern Japan, Thursday, Jan. 23, 2014. The New York Yankees capped an offseason spending spree by agreeing Wednesday, Jan. 22 to a $155 million, seven-year contract with prized 25-year-old right-hander Tanaka. (AP Photo/Kyodo News) JAPAN OUT, CREDIT MANDATORY

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A diesel locomotive travels in Union Pacific's Council Bluffs, Iowa, rail yard, Tuesday, Jan. 7, 2014. The boom in natural gas production that dramatically changed the nation’s energy outlook may now be on the verge of shaking up American railroads. Rail companies are considering replacing diesel locomotives, which have been the workhorse of freight railroads since World War II, with redesigned engines that could burn natural gas as well. They believe the new models could cut fuel costs by up to 50 percent and reduce pollution, potentially changing the economics of large-scale shipping. (AP Photo/Nati Harnik)

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This photo from Sept. 14, 2013, which was provided by General Electric, shows an experimental natural gas locomotive in Erie, Pennsylvania. The diesel locomotives that became freight railroads’ workhorse after World War II could be replaced in the next few years by units like this that burn a mix of natural gas and diesel. The switch could likely reduce fuel costs and pollution significantly while allowing railroads to take advantage of abundant domestic supplies of natural gas. But many questions about using natural gas locomotives remain unanswered, and those could easily derail the idea. (AP Photo/General Electric, Mark Fainstein)

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This photo from Sept. 14, 2013, which was provided by General Electric, shows an experimental natural gas locomotive in Erie, Pennsylvania. The diesel locomotives that became freight railroads’ workhorse after World War II could be replaced in the next few years by units like this that burn a mix of natural gas and diesel. The switch could likely reduce fuel costs and pollution significantly while allowing railroads to take advantage of abundant domestic supplies of natural gas. But many questions about using natural gas locomotives remain unanswered, and those could easily derail the idea. (AP Photo/General Electric, Mark Fainstein)