The Rockies just faced Aaron Sanchez six days ago. Sanchez couldn't reach the fifth inning giving up five walks in a 7-5 Giants home loss. 

Now the Rockies get Sanchez at Coors Field where Sanchez figures to be even worse. Not only did the Rockies just see Sanchez, but Sanchez is a sinkerball pitcher. That's not a good fit for Colorado's high altitude where pitch movement is heavily affected and Coors Field being such a great hitter's park. 

Colorado starter German Marquez knows how to pitch at Coors. He's 1-0 there with a 3.13 ERA this season. He'll face a Giants lineup that could be minus Brandon Crawford and Mike Yastrzemski. 

The Rockies have averaged 6.8 runs during their last five home games, four of which have been victories. 

The Giants historically struggle at Coors losing in 25 of their last 35 visits.