NAPLES, Fla. (AP) -- Austin Ernst has a one-shot lead after Thursday's opening round of the CME Group Tour Championship, and South Korean rookie Sei Young Kim has the early upper hand in the race for a $1 million bonus.
Ernst shot a 6-under 66 at Tiburon Golf Club, one shot better than South Korea's Mi Hyang Lee.
Kim was another shot back, along with a fivesome of Americans - Jennifer Song, Cristie Kerr, Brittany Lincicome, Jaye Marie Green and Gerina Piller.
Kim already has clinched rookie of the year honors, plus has a shot to win the ''Race to CME Globe'' and the $1 million bonus. Lydia Ko, Inbee Park and Stacy Lewis also could win that bonus by capturing the season finale; Ko shot 69, Park a 71 and Lewis a 72.