The Colorado Rockies embark on the 2009 season today in Arizona without Matt Holliday, who, if you recall, was an important part of the team’s remarkable World Series run just two seasons ago. Now the Rockies “must try to find a way back without their best player,” The Associated Press notes, pointing to Holliday’s trade to Oakland last winter.

So who is playing? The team’s 25-man opening day roster is set. And from the April edition of 5280 , Robert Sanchez runs through everything you need to know about the 2009 season at Coors Field.