World No.4 Lee and her South Korean partner produced 12 birdies in a 12 under par 58 in the closing-round fourball format at Midland Country Club.

However, the two big guns were outshone by Thailand's Jasmine Suwannapura and American Cydney Clanton who won the two-woman teams event by six strokes at 27 under, 253.

The winners combined for a closing 11 under par, 59.

It is a second LPGA Tour victory for Suwannapura, and a first for Clanton, who had never finished better than seventh in an LPGA event.

Lee and Ko finished one shot ahead of third-placed Thai stars Ariya and Moriya Jutanugarn, who closed with a 61.

Cydney Clanton and Jasmine Suwannapura defeated Lee and Ko by six shots. PHOTO: Gregory Shamus/Getty Images.

It was the third runner-up result of the year for Lee, who won the LA Open in April, and it took her past $US1million in prize money this season.

She sits fourth on the season money list and third in the season points race behind leader Ko.

Lee admitted it had taken their pairing a bit too long to settle into the teams event, which used a format of two rounds of foursomes and two of fourball.

"We both played better than we did the last time we played fourballs," Lee said.

"We just had a better rhythm out there. I think we just fed off each other.

"Jin Young had so many birdies today, so I just tried to keep up pretty much."