SAN FRANCISCO — Willy Adames homered twice, Jung Hoo Lee singled in the winning run in the ninth inning and the San Francisco Giants beat the Chicago Cubs 4-3 on Thursday to complete a three-game sweep.

It was the Giants 10th walk-off win this season and extended their winning streak to five games.

San Francisco’s offense didn’t do much outside of Adames’ homers until the ninth.

Casey Schmitt drew a one-out walk from Daniel Palencia (1-4) and took second on Wilmer Flores’ single. Lee then singled to right to score pinch-runner Christian Koss, who slid into home as the throw sailed wide of the plate.

Michael Busch hit his 25th home run for the Cubs. Dansby Swanson also went deep for Chicago.

Ryan Walker (5-4), the third of three relievers used by Giants manager Bob Melvin, retired one

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