Pollock answers Astros` rally with walk-off knock
(MLB.com Arizona Diamondbacks)

A.J. Pollock`s single off Brad Peacock scored Deven Marrero from third base as the D-backs walked off the Astros, 4-3, on Saturday night at Chase Field. The hit capped a back-and-forth game that saw the D-backs lose a late lead, while the victory snapped Arizona`s three-game losing streak.