BOSTON (Interstat) — Andrew Alvarez tossed 4 2/3 scoreless innings, allowing two hits and striking out six, as the Washington Nationals defeated the Boston Red Sox 10-2 on Wednesday afternoon at Fenway Park. Alvarez improved to 2-1 after losing his previous two starts. The Nationals (45-43) took an early lead on Andrés Chaparro’s two-run homer in the first inning. They broke the game open with a five-run fourth, highlighted by Luis García Jr.’s two-run single and Jacob Young’s RBI double. James Wood added a three-run homer in the seventh, finishing 2 for 4 with three RBIs. Chaparro had two RBIs. Brad Lord tossed 2 1/3 scoreless innings of relief, and Carson Palmquist added a scoreless frame. Boston (37-48) scored both runs in the eighth. Payton Tolle (4-6) took the loss. Attendance was 32,574. The game lasted 3 hours, 5 minutes. Washington had 13 hits, Boston nine.