Semi-retired Lexi Thompson is going into the weekend contending for her first major title in more than a decade, and in a dwindling group of players under par at the KMPG Women's PGA Championship, while Jeeno Thitikul extended her lead.

Call her semi-retired. Or a part-timer. But as Lexi Thompson showed Friday in sweltering, blustery conditions, she’s no less competitive, especially when a major championship is on the line. Thompson’s 2-under 70 in the second round of the KPMG Women’s PGA Championship was the equivalent of going low on a day in which under-par rounds were as scarce as shade on the virtually treeless