By Eric Gilmore Box score OAKLAND, Calif. — Astros left-hander Dallas Keuchel was chasing his third straight quality start and first win since July 27 when he took the mound against the Oakland Athletics on Friday night. Keuchel didn’t make it out of the fourth inning, and the Astros’ chances of playing spoiler for the second straight night all but vanished when he made his early exit. Keuchel (5-9) allowed five runs and 10 hits, taking the loss as the Astros fell 7-5, one night after beating the A’s 3-2. He struck out three, walked two and threw 95 pitches, just 61 for strikes. He lost his fourth straight game. [...]