PRATTVILLE, 28 Aug 2015, (AFP) - Lang got off to a sizzling start on the par-72 Senator course with five birdies in the first seven holes. She was seven-under through 12 and looked set for a possible course record until she was slowed by bogeys at 13 and 14.
"It was just one of those days," said Lang, who birdied 16 and 17 to hold a two-stroke lead over Tiffany Joh, Sydnee Michaels and Ryann O'Toole after 18 holes.
"It was so enjoyable," Lang added. "I wasn't thinking about a whole lot. You know, I was just super committed to seeing my shots, it was so much fun."
Lang, whose 65 matched her best round of the year, said her golf was "pretty flawless."
"Even when I was making pars, I was burning the edge from 10 feet," she said. "Every hole I was right there. The birdies on 16 and 17 were pretty big after the bogeys on 13 and 14... small misses, but I stayed aggressive so I was excited with that."
Lang, seeking a second LPGA title, has held at least a share of the first-round lead six times in her career but has never been able to close it out.
She last held a share of the lead after a 66 at the first round of the 2015 Honda LPGA Thailand but faded to a 73 in the second round and finished in a tie for 13th.
Earlier this season she was within striking distance of a second career title with a final-round 65 at the Manulife Financial Classic, but Suzann Pettersen birdied two of her last three holes to edge Lang by one stroke.
All three of the trio sharing second played without a bogey.
They were one stroke in front of a group of five players on 68: South Korea's Kim Hyo-Joo, Ariya Jutanugarn of Thailand, Denmark's Therese Koelbaek, Paraguay's Julieta Granada and Feng Simin of China.
Leading first-round scores on Thursday in the LPGA Classic (par 72, USA unless noted)
65 - Brittany Lang
67 - Tiffany Joh, Sydnee Michaels, Ryann O'Toole
68 - Kim Hyo-Joo (KOR), Ariya Jutanugarn (THA), Therese Koelbaek (DEN), Julieta Granada (PAR), Feng Simin (CHN)
69 - Laura Diaz, Carlie Yadloczky, Hsu Wei-Ling (TPE), Kim Sei-Young (KOR), Lexi Thompson, Katherine Kirk (AUS), Jackie Stoelting, Janie Jackson, Candie Kung (TPE)
70 - Lin Xi Yu (CHN), Austin Ernst, Ally McDonald, Oh Ji-Young (KOR), Dori Carter, Stacy Lewis, Tseng Ya-ni (TPE)