CHICAGO (Interstat) — Peter Lambert pitched five innings of three-run ball and Nick Allen went 3 for 3 with a home run and two RBIs as the Houston Astros defeated the Chicago Cubs 8-5 on Sunday at Wrigley Field. The Astros scored five runs in the fifth inning, highlighted by Christian Walker’s three-run homer, his 14th of the season. Allen added an RBI single in the ninth. The Cubs scored three in the second on a double by Pedro Ramírez and a sacrifice fly, then two in the seventh on Michael Busch’s homer. Lambert (3-4) allowed five hits and struck out five. Shota Imanaga (4-5) took the loss. Nate Pearson earned his first save with a scoreless ninth inning. Attendance was 40,048 with a game time of 2:40. Houston improved to 23-31; Chicago fell to 29-24. The Astros have won three straight games.