The Phillies, who have posted a 16-8 record in their past 24 games at Citizens Bank Park, could use another win at home. They are 33-37 in Philadelphia this season and inching toward the .500 mark.
What's more, in 22 home series this season, the Phils have won eight, lost 11 and split three.
The Rockies have other ideas. Colorado is 9-9 in its past 18 road games. The Rockies are on a roll of their own, going 15-10 over their past 25 games.
It will be up to Tyler Chatwood to keep Colorado's improvement moving forward on Saturday. He struggled with his command in his most recent start, walking five batters in three innings against the Braves, and he is averaging 4.9 walks per nine innings.
"It's kind of tough pitching behind in counts, especially to a team like that," Chatwood said. "I didn't really have command and that was it."
Since joining the starting rotation, Chatwood has a 4.60 ERA and has walked 18 and struck out 18.
The Phillies expect more from Cole Hamels this time around. He did not have his best stuff against the Braves in his last start, but still allowed only three runs on six hits in six innings. He walked two and struck out six in the outing.
Rockies: Rutledge to get look at second
• Rookie infielder Josh Rutledge will play second base to see how he plays with shortstop Troy Tulowitzki, who is currently on Minor League rehab assignment as he returns from left groin surgery.
• Rookie outfielder Charlie Blackmon set his career high with four hits in Colorado's 1-0 loss on Thursday at Atlanta. He has seven hits in his last 20 at-bats and is hitting .213 in his first 18 games. Overall, he has three multi-hit games.
Phillies: Ruiz activated, Polanco done for year
• Carlos Ruiz (plantar fasciitis) was activated from the disabled list and infielder Placido Polanco was placed on the 15-day DL with lower back inflammation. It's unclear how much action Ruiz will see during the remainder of the season. Polanco will not play again in 2012.
• Jimmy Rollins, who leads the team in RBIs, is on track to be the first shortstop to lead Philadelphia in that category since 1920, according to Elias Sports Bureau.
• Colorado right-hander Josh Roenicke will have a lighter workload down the stretch, manager Jim Tracy said. He has been moved from a "hybrid" role to a situational role.
• Catcher Brian Schneider (strained left hamstring and injured right ankle) might not return to the Phillies before the end of the season.
• Rockies outfielder Dexter Fowler needs two stolen bases to tie Matt Holiday for seventh on the Rockies all-time list with 66.
•Pitcher Colin Kleven has been named the Phillies' first recipient of the Minor League Community Service Award.