Christian Walker singled home the go-ahead run in the ninth inning and the Houston Astros beat the Arizona Diamondbacks 4-3 on Wednesday to complete a three-game sweep. Zack Short and Taylor Trammell started the ninth with bunt singles against Kevin Ginkel (1-4).

With his team up 4-3 in the bottom of the ninth inning, closer Josh Hader delivered a 3-2 pitch to Diamondbacks second baseman Ketel Marte—one that was pretty clearly a ball and would have put runners on first and second. Walsh, however, saw it differently, and rung up Marte to give Houston the win. Pretty clearly a ball.

The Diamondbacks lost a third straight close game to the Astros, getting swept in their final home series before the trade deadline.

Framber Valdez pitched seven effective innings for his 10th straight win, Brice Matthews hit his third homer in two games and the Houston Astros rallied to beat the Arizona Diamondbacks 3-1 on Tuesday night.

The Arizona Diamondbacks were swept by the Houston Astros by a score of 4-3 on Wednesday, ending a demoralizing three-game set on a sour note. Brandon Pfaadt pitched well until the sixth inning, but familiar bullpen and offensive woes made the ultimate difference.

The Diamondbacks open a three-game series with the Houston Astros at Chase Field with Arizona's Zac Gallen facing Houston's Colton Gordon.

Similarly to Gallen, left-hander Eduardo Rodriguez showed flashes of a turnaround before falling back down to earth. After pitching to a 1.98 ERA in the month of June, Rodriguez has been knocked around for 13 runs in his last 8.1 innings.