California:Ireland's Padraig Harrington took a three-stroke lead in the first round of the Nissan Open in California on Thursday. Phil Mickelson picked up where he left off and shot a five-under par 66 in the opening round. The lefty's long putt at the third hole rolled around the cup and dropped in for a birdie. Great Britain's Luke Donald knocked down a birdie at the 14th hole, but three bogeys on the back nine had him at three-over par through 13 holes. South Africa's Retief Goosen sank a birdie putt at the 17th hole on his way to shooting even par for the round. Fellow South African Ernie Els hit a great second shot at the seventh which led to a birdie on the hole. Els shot a 2-under par 69 and is six strokes off the pace. Cooling off Geoff Ogilvy's birdie putt at the 12th hole helped the Australian to a score of 3-under par through 14 holes. Through 15 holes of play, Spain's Sergio Garcia has knocked in six birdies, including one at the 17th on his way to a score of 3-under par. Vijay Singh of Fiji began the day with an eagle at the 1st hole but later cooled off and finished the round at 3-under par, 68. Jim Furyk was able to up and down the 1st hole and was only four strokes behind the 1st round leader, Harrington.