The Colorado Rockies decided about 10 years ago to build around their slugging first baseman. Now, while the team is no longer built around a single player, Troy Tulowitzki anchors the middle of the lineup and the middle of the diamond, making shortstop the one position where the Rockies have no questions.

Offseason rumors linked the Colorado Rockies to many free agent infielders, any of whom would have impacted this position in some way if they had signed. Yet, after all the shopping, the Rockies likely end up with the same second baseman to start 2010 as they finished 2009.

Rockies can monitor the progress and rehabilitation of injured players, most of them minor leaguers.

The Colorado Rockies added Jhoulys Chacin, Matt Belisle, Matt Murton and Mike McCoy to their roster. Adam Eaton was designated for assignment and Chris Nelson placed on the 60-day disabled list to make room for Belisle and McCoy on the 40-man roster.

Wrist injury likely to end season

And Chacin finishes a strong May at Double-A Tulsa

Struggles lead to roster decision

Rockies 7-game winning streak snapped.

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.

Jason Marquis pitched three perfect innings for the Rockies in a “B” game against the Diamondbacks.

The Rockies announced Wednesday 21 players have agreed to one-year contracts with team.