Neither Colorado nor Arizona is in top form. The Diamondbacks, though, are home, have Zach Greinke going and are in absolute must-win mode in order to keep their slim playoff hopes alive.

The Rockies are 1-5 in their last six games. They have scored nine runs during these past six games and aren't likely to have star shortstop Trevor Story, who is suffering from right elbow inflammation.

Greinke is 19-4 at home the past two years. He has a 2.43 home ERA this season. Arizona has won 24 of his past 35 starts at Chase Field. Greinke has faced Colorado four times this season and is 3-0 with a 2.77 ERA. I trust him in this spot.

I can't say the same for Rockies starter German Marquez, who has nearly a 4.00 ERA on the year. Marquez has been pitching better, but has struggled versus Arizona with a 4.33 ERA against the Diamondbacks this season in five starts.

This is a short lay price to get the better pitcher at home where he has a dominant record.