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Hunter Mahan birdied 18 to grab a share of the lead heading into the final round.
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Allan Henry/US PRESSWIRE
Aaron Baddeley made seven birdies, three bogeys and an eagle to finish with a share of the lead.
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Phil Mickelson birdied three of the last five holes to move into contention.
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Jason Day made three birdies and no bogeys over the final ten holes to finish two shots back.
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Adam Scott started the day with the lead, but he tumbled down the leaderboard after a four-over 74.
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Luke Donald shot an even-par 70, but he remains in the hunt for the title and the FedEx Cup.