SAN DIEGO — Break out the umbrellas for rain, and the white flags for Tiger Woods.

Winning the Buick Invitational became a matter of when — not who — after Woods put on a clinic Saturday by hitting 17 greens in regulation, building an eight-shot lead and hoping he doesn't have to wait until Monday to collect a fourth straight title at Torrey Pines.

"I'm in second place. I'm not really in contention," Stewart Cink conceded. "He's just hard to beat right now."