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overcame a double bogey on No. 7 to shoot a two-under 70. He is four shots off the lead.
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Mickelson had to hit another drive on No. 7 after he lost his first ball in a tree.
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Mickelson will try to win his fourth title at Torrey Pines on Sunday.
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birdied 18 to build a two-shot lead.
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made birdies on 16 and 17 to finish two shots off the lead.
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made four birdies on the back nine to shoot a 68.
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hit the par-5 18th in two shots to make an easy birdie for a two-under 70.