The Arizona Diamondbacks turn to Brandon Pfaadt, who, with his long-term contract, wouldn't seem to be a player they'd trade.

The Astros completed a sweep of the Diamondbacks with a 4-3 win that left them, as of the game's end, with the best record in the American League. Christian Walker, the former Arizona first baseman, delivered the go-ahead hit in the top of the ninth.

The Arizona Diamondbacks were swept in a three game series by the Houston Astros this week, dropping their record to 50-53. That leaves them still 5.5 games out