SCOTTSDALE, Ariz. — Asked about season-title scenarios entering the finale on the 50-and-older Champions Tour, Tom Lehman said all he knew was "if I win, I win."

That was all he needed to know.

Lehman, 53, won the Charles Schwab Cup Championship on Sunday to become the first player to win the season points title in two consecutive years.

After shooting 68-63-62 to take a one-stroke lead over Seattle native Fred Couples into the final round, Lehman birdied four of the last five holes for a 5-under-par 65 and a six-stroke victory over Jay Haas (69).

Lehman, a Scottsdale resident, finished at 22-under 258 on Desert Mountain's Cochise Course. He set a Champions Tour record for 72-hole lowest score (Jack Nicklaus had a 261 on a par-72 course in the 1990 Mazda Senior TPC in Dearborn, Mich.) and tied the tournament mark for relation to par set by John Cook in 2009 in Sonoma, Calif.

"Absolutely, I played some of my best golf of the year," said Lehman, who received a $1 million annuity in the Schwab Cup points competition and earned $440,000 for the tournament victory

Jay Don Blake (66) was third at 14 under and Couples (73) and Fred Funk (65) tied for fourth at 13 under.

Kirk Triplett (69), a Pullman High School graduate, tied for 17th place at 2 under.

Couples was playing in his first Champions Tour event since a back injury forced him to withdraw after hitting one shot in the Boeing Classic on Aug. 24 at TPC Snoqualmie Ridge.

Bernhard Langer finished second in the standings, 435 points behind Lehman, and earned a $500,000 annuity. Couples was third in points and Triplett placed 20th.

Poulter wins in China

SHENZHEN, China — Englishman Ian Poulter, a standout on the European Ryder Cup team this year, won the HSBC Champions for his first tournament victory of the season, overcoming a four-stroke deficit with a 7-under 65.

Poulter finished at 21-under 267 for a two-stroke victory in the World Golf Championships event. "I've only been one season without a victory and I certainly didn't want to go another one," said the 36-year-old Poulter, who earned $1.2 million.

Americans Jason Dufner (64), Scott Piercy (65), Phil Mickelson (68) and South African Ernie Els (67) tied for second place.

Kyle Stanley (69) of Gig Harbor tied for 65th place at 292.

Other tournament

• American Stacy Lewis rallied to win the Mizuno Classic in Shima, Japan, for her LPGA Tour-leading fourth title of the year. Lewis had birdies on the final three holes en route to an 8-under 64 and a one-stroke victory over Bo-mee Lee (72) of South Korea.

Lewis, 27, finished at 11-under 205 for 54 holes and earned $180,000.

Jimin Kang (77), a graduate of King's High School in Shoreline, tied for 68th at 7 over.