Just one birdie against three bogeys in a disappointing card of two-over 73 led to Arjun Atwal slipping from tied second to tied 19th after the second round of the Heritage golf tournament here.
Atwal is four-under after two rounds.
The Orlando-based golfer, the first Indian to win on the US PGA Tour last year at the Wyndham Championship, had a six-under 65 in the first round.
He started on the 10th and picked up a birdie on 11th, but thereafter there weren't any birdies as he bogeyed the 17th, sixth and seventh.
Atwal is six shots off the leader Luke Donald of England, who shot a 65 in second round after a first round 67 to be 10-under 132.
He was one clear of overnight leader Garrett Willis (64-69).
Camila Villegas (68), Jim Furyk (66), Jason Day (65) and Chad Campbell (69) were all tied third at eight-under 134.
Chengdu (China): After two successive 66s, it was a bleak day for Jeev Milkha Singh as he managed just two birdies against one bogey for a one-under 71 and slipped to tied ninth at the Volvo China Open here on Saturday.
Shiv Kapur, the only other Indian in the field played an even par 72 in the third round with two birdies on the front nine and two bogeys on back nine at the Luxehills International Country Club.
Kapur is now six-under 210 and in tied 56th place. SSP Chowrasia had missed the cut earlier.