Colorado at Arizona

Arizona's Patrick Corbin is 9-1 this season. At home, he is 5-0 with a 1.63 ERA. Meanwhile his counterpart for the Rockies, Roy Oswalt, owns an 0-3 mark with a sky-high 7.87 ERA. Clearly, Oswalt's  best work is behind him. The Rocks are just 16-25 on the road while Arizona is 23-16 here at home. The D-Backs have been stellar in the field, committing just 37 errors on the season (just 0.43 per game). That's not a good sign for the Rockies, who have historically needed help to get wins. Colorado is just 38-63 the past two seasons when facing good fielding teams (those allowing under 0.7 errors per game). Over the past three seasons overall, Colorado is 77-145 as a dog. I am on the Diamondbacks in this one.