With an improbable rally by Woods in the morning and pure putting by Stricker in the afternoon, they became the first partnership in the Presidents Cup and the first in 30 years of any team competition to go 4-0.
Phil Mickelson had a chance to join them with an undefeated record using different partners. Mickelson and Sean O'Hair each had a birdie putt inside 15 feet on the final hole to scratch out another win, but had to settle for a halve.
The International team walked away from Harding Park the last two days with momentum from keeping close. But as darkness fell across from Lake Merced, the deficit looked daunting with only 12 singles matches remaining Sunday.
The Americans had a 12½-9½ lead. No team has rallied from three points behind on the final day to win the cup outright, and the Americans have lost only one singles session in the seven previous Presidents Cup matches.