The Giants' offense has been better than advertised. San Francisco ranks 11th in the majors in runs scored. The Giants are averaging 6.7 runs in their last seven games. 
Now the Giants get to face erratic Robbie Ray, who has been dreadful this season with an 8.59 ERA. Ray had a 5.40 ERA versus the Giants in three starts last season. 
The Giants are pitching youngster righty Logan Webb. He has a respectable 3.54 ERA, but only once has he reached five innings in five starts. So the horrific Giants bullpen figures to see plenty of work. 
The Diamondbacks hit righties far better than lefties. They have the fourth-highest batting average in the NL going against righthanders. Arizona is averaging 7.6 runs in its last eight games when facing a righty starter. 
Normally a pitcher's park, Oracle Park has been a hitter's paradise this season. The Over is 9-0-1 during the last 10 games in San Francisco.