Little-known Roberto Castro tied the course record with a sizzling 9-under par 63 on Thursday to grab the lead after the first round of the Players Championship. Rory McIlroy and Zach Johnson share second place as each fired a 6-under 66 in their opening round at TPC Sawgrass. World number one and 2001 champion Tiger Woods is part of a group tied for fourth place at 5-under
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