Denver, CO (SportsNetwork.com) - Monday's series opener between the Colorado Rockies and Arizona Diamondbacks has been postponed due to rain.

The Rockies, losers in five straight games, were set to send Tyler Matzek to the mound to oppose D-backs' opening day starter Josh Collmenter. Colorado's last win came a week ago against Arizona with Matzek on the hill.

There is no makeup date at this time.