Perez has one title on the PGA Tour, that coming at the 2009 Bob Hope Classic, but he has two top-10 finishes in his last three events. He was 7-under for the tournament and three shots out of the lead when he stepped to the 13th tee, then went on a birdie binge that came to a close with Perez holing an eight-foot putt at the par-4 18th.
Bubba Watson, winner last week in New Orleans, shot a 68 and was eight shots behind in a tie for 29th.
Among those missing the 36-hole cut was defending champion Rory McIlroy, who turned in a two-day total of 147. McIlroy was playing in the United States for the first time since he let a chance to win the Masters slip away last month.
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