The Arizona Diamondbacks booked a fourth consecutive win when they defeated the Colorado Rockies 10-5 in the opener of a three game set at Coors Field last night. They'll be looking to match their longest winning streak of the season with another win tonight, but my money is on the Rockies to rebound with a win.

Here are my keys to the game:

1. Pitching - The Rockies hand the ball to Chris Rusin (1-0, 4.43) who was lit up for seven runs on 13 hits in 4 1/3 innings at San Francisco in his last start. The Rockies still won the game 17-7, but the left-hander might not need that much help from the hitters tonight as he is 2-1 with a 1.71 ERA in four career starts against the Diamondbacks. The D'Backs counter with Rubby De La Rosa (3-4, 4.60 ERA) who had his start pushed back on day as Arizona recalled Archie Bradley to toe the rubber in the opener. Arizona is 1-5 in De La Rosa's last six starts with five days of rest and the 27 year old right-hander is 1-3 with a 6.00 ERA in four road games this year.

2. Batter vs. Pitcher - Several Rockies batters have solid numbers against De La Rosa. The current roster has a combined .299 batting average against him and Carlos Gonzalez is 4-for-10 with a homer. Gonzalez was 2-for-5 with a double yesterday.

3. X-Factor - Diamondbacks are 1-5 in their last six games when coming up against a left-handed starter.

Selection: This is a play on the Colorado Rockies (8*)