Stewart Cink won the Charles Schwab Cup Championship last year, and he has five victories this season, including two majors. (EPA Images pic)PHOENIX: Stewart Cink, aiming for his second consecutive PGA Tour Champions season title, leads by one stroke after the first round of the year-ending Charles Schwab Cup Championship on Thursday in Phoenix.

Cink, who leads the season standings, eagled his first hole and was 6 under par through seven holes en route to an 8-under 63 at Phoenix Country Club.

South Africa's Ernie Els is second at 64, and Australia's Steve Allan is third at 65. Jerry Kelly, Australia's Richard Green and Denmark's Soren Kjeldsen are tied for fourth at 66.

Zach Johnson, the only golfer with a mathematical chance of overtaking Cink for the season crown, is tied for 20th at 69.