DULUTH, Ga. -- Zach Johnson's first full day as the leader on the PGA Tour felt very familiar to him.

He played solidly, made putts when he needed to, and held on to the top spot.

"I really didn't get nervous," Johnson said. "It doesn't feel that different. It's just golf."

The rookie shot a 4-under 68 on Saturday to take a three-stroke lead over Padraig Harrington and Scott Hend after the third round of the BellSouth Classic.

Harrington shot a 67, rallying after a triple bogey by making six birdies on his last 10 holes in the last event before the Masters. Coming off a second-place finish in The Players Championship last week -- his second straight runner-up finish in that tournament -- the Irish star is looking for his first victory on the PGA Tour.

Sorenstam leads inLADefending champion Annika Sorenstam scrambled to stay in front, shooting a 2-under 70 on Saturday in the second round of the Office Depot Championship in LosAngeles.

If she wins, it would be her 50th career LPGA Tour victory, and also mark the seventh time she's gone wire-to-wire to win.

Mi-Hyun Kim, beaten by Sorenstam in a playoff for the title three years ago at Wilshire Country Club, was in contention again with a 71 that left her five shots off the lead.

Pak, who finished in a three-way tie for second last year, had a second-round 70 and was at 144.

Karrie Webb couldn't overcome an opening 81 and failed to make the cut despite her second-round 72.