AL West-leading Astros host ascending Mariners

For a span of nearly two months, the Houston Astros have done little more than tread water, and they capped a nine-game trip Sunday with a walk-off loss to the San Diego Padres.

The Astros closed the road trip at 4-5 and are 25-24 since concluding a six-game winning streak against the Oakland Athletics on July 7.

And while the Athletics have been unable to make up ground during the Astros' extended run of mediocrity --