SAN FRANCISCO – Whether it was a curveball that sat in the low-90s, a slider a tick slower, or a changeup, sinker or slider of varying speeds, Kai-Wei Teng put each pitch exactly where he wanted on a relatively warm Friday night at Oracle Park.

Unleashing his five-pitch arsenal, Teng overwhelmed Nationals hitters to the tune of five scoreless innings of relief in San Francisco’s 5-0 victory over the Nationals.

Six days after being saddled with the loss in New York, the 26-year-old from Taiwan was sharp against cellar-dwelling Washington. He struck out four, allowed just three hits and walked only one while throwing 64 pitches.

For his efforts, the righthander earned the first win of his career and allowed San Francisco to start a nine-game homestand with a victory. The Giants, who won

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