The N.L. West Power system Play is on Colorado. Game 910 at 8:40 eastern. Colorado fits a tight 90% system that plays on home favorites that are off a road dog loss and still manges to score 5 or more runs and are taking on an opponent off a road dog loss and scored 2 or less runs and had 5+ Hits. The Rockies are back home and are 3-1 on Monday and have won the last 4 here in the series with Arizona.. The Diamondbacks are 0-4 on the road off a road loss vs an opponent that is also off a road loss. They have Collmenter going and he has allowed 9 runs in 9 innings in his last 2 starts here. Matzek for Colorado has won 3 of his last 4 home starts and has started to improve from last year. With Arizona 0-3 vs leftys and sporting a 5.15 road bullpen era. We will side with the Colorado tonight.