Kiwi Danny Lee has capitulated on his second round back-nine at the latest PGA event in California

He's fired a bogey, two double bogeys, and a quadruple bogey on his last four holes to be four-over for the day and overall.

American Justin Thomas leads by a shot at 14-under.

Lydia Ko's made progress up the leaderboard, though still remains well off the pace after two rounds of the LPGA's latest event in Georgia.

The Kiwi's carded a two-under 70 to be three-under for the tournament in a share of 21st.

American Ally McDonald leads by a shot at 10-under.