Rosters will expand to 40 players early next week, and with the recent spate of injuries in the Colorado Rockies bullpen, the team is certain to add a few players. Who might be among the September additions to the Rockies roster?

Todd Helton will drive to Casper on Thursday and play three games there Friday, Saturday and Sunday on a rehab assignment with the Colorado Rockies affiliate in the Rookie Pioneer League.

Colorado Rockies pitching prospect, the 34th player taken overall in the 2009 draft, among handful of minor leaguers promoted.

To talk about any outfield position for the Colorado Rockies is to talk about all outfield positions. The Rockies have three clear starters, but a deep bench of outfielders who can play multiple positions will mean plenty of mixing and matching to create the best possible matchups this season.

First baseman Josh Phelps, outfielders Alex Escobar and Bronson Sardinha and right-hander Chris Gissell, who have agreed to minor league contracts, will have the chance to make the Triple-A Colorado Springs roster in spring training.

McKenry, Roe, Escalona, Nicasio and Alburquerque get coveted roster spots

Behind Hi Corbett Field, where the Rockies play and practice, are five full diamonds where the minor leaguers work out and play their exhibition games. There is also a half field used mostly for catchers drills. Small sets of bleachers can be found at the full fields, four of which fan out from a central point like spokes on a wheel. There’s a wide-open-spaces feel like a city park, totally different from Hi Corbett.