Landen Roupp pitched into the seventh inning, Jung Hoo Lee had two hits and scored two runs, and the San Francisco Giants beat Washington 4-0, ending the Nationals’ five-game winning streak.

Someone will have to pick up the offense when Wilmer Flores finally cools off, and the starting rotation is showing some holes.

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The Giants’ starting rotation has undergone something of a youth movement this week, with Hayden Birdsong and Kyle Harrison suddenly entering the fold after briefly serving as understudies in the bullpen.

WASHINGTON D.C. — The Giants announced on Friday afternoon that left-hander Kyle Harrison will start on Saturday in place of Justin Verlander, who was placed on the 15-day injured list (retroactive to May 19) on Thursday with a right pec strain.

Stitches is betting on the Pirates to beat the visiting Brewers and the host Nationals to topple the Giants on Friday night.

The Giants doubled their lead to 4-0 in the top of the eighth inning when Wilmer Flores drove in Lee with a single — tying the Cubs’ Seiya Suzuki for the most in the National League — and Chapman scored from third on a wild pitch. Following Flores’ RBI single, a group of Giants fans began a “Let’s go Giants” chant in the lower bowl.