San Diego: Tiger Woods shot a 66 in his first PGA round of 2007 but was overshadowed by Brandt Snedeker's 11-under-par 61 on the first day of the Buick Invitational.Woods was two over par after four holes, but recovered with a pair of eagles and four birdies to drop to six under par. Snedeker, a 26-year-old Tour rookie, tied the North Course record with his 61. He holds a two-stroke lead over Korean Charlie Wi.The North Course played considerably easier for the Buick field, with the top 45 players on the leaderboard all making their rounds upon it. Hitting the pinWoods hit the pin on his approach shot on the 18th hole - he started on the back nine - and tapped in for an eagle to make the turn at three under par.He picked up another stroke on the second hole and on the ninth made another beautiful approach shot. Woods used a five iron that went 216 yards, a hair past the pin, and rolled sideways towards the cup.He walked up the fairway to the applause of his familiarly large gallery and smoothly stroked the ball straight in the cup for another eagle. He finished with a solid six-under-par 66. Spectacular ironSnedeker's spectacular iron on the first hole led to a birdie after he barely missed the eagle putt.His round included one eagle and nine birdies, the last of them coming on his last hole of the day, the ninth.Entering the clubhouse three strokes behind Snedeker was John Senden, who played alongside Woods and carded an eight-under 64.In between those two on the leaderboard was Charlie Wi.Wi, a Korean who has several Asian PGA titles under his belt, nearly drew to within one stroke of Snedeker but saw his eagle putt on his final hole roll wide. He tapped in for birdie to go to nine under.Phil Mickelson, like most of the golfers on the South Course, did not have as much success. Mickelson shot a horrid iron shot on the 14th hole that landed him in a hazard.