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Roger S. Goodell, commissioner of the National Football League (NFL), left, and Jeffrey 'Jeff' Immelt, chairman and chief executive officer of General Electric Co. (GE), sit during a news conference in New York, U.S., on Monday, March 3, 2013. The National Football League, General Electric Co. and Under Armour Inc. will join in a four-year, $60 million effort to develop imaging technology for detecting, treating and preventing brain injuries. Photographer: Scott Eells/Bloomberg via Getty Images

Roger S. Goodell, commissioner of the National Football League (NFL), left, and Jeffrey 'Jeff' Immelt, chairman and chief executive officer of General Electric Co. (GE), sit during a news conference in New York, U.S., on Monday, March 3, 2013. The National Football League, General Electric Co. and Under Armour Inc. will join in a four-year, $60 million effort to develop imaging technology for detecting, treating and preventing brain injuries. Photographer: Scott Eells/Bloomberg via Getty Images