By Mark Lamport-Stokes PONTE VEDRA BEACH Florida (Reuters) - Tiger Woods is the world's top-earning athlete and tournaments still lure blue-chip sponsors and huge TV rights but golf is losing millions of players, prompting desperate ideas to stem the tide. According to the National Golf Foundation (NGF), the sport has lost five million players in the United States in the past decade and 20 percent of the 25 million golfers now active in the country are likely to quit in the next few years. More...