It's rarely wrong to back the Astros especially when the price is fair, which it is here. Houston is 27-8 in its last 35 games and is tied for the best winning percentage in the majors. 

Houston has key injuries, but also has a very strong farm system. Because of that the Astros have been able to cover up their injuries. 

The Astros are 21-8 in Brad Peacock's last 29 starts. Peacock is one of the most underrated pitchers in baseball. He's overshadowed in Houston by Justin Verlander and Gerrit Cole. But he's a tremendous pitcher giving up two runs or less in eight of his 11 starts. 

The Brewers are 1-7 in their last eight interleague road games. They are a solid National League club, but not at the Astros' elite level. 

Milwaukee is pitching Freddy Peralta, who has shown flashes but remains highly inconsistent. He has a 6.23 night ERA this season.