A National League All-Star at second base, Phillips missed six starts from Aug. 27 to Sept. 1 with a swollen right hand he suffered on Aug. 25 at San Francisco, when he was hit by a Santiago Casila pitch. Phillips was also out of the lineup on Thursday.
"His hand was bothering him for a while, and then he got into a habit of swinging at bad pitches," said Reds manager Dusty Baker. "Now we're trying to get him back going because we need him to get this thing rolling."
Rolen, also an All-Star at third base for the sixth time, had missed the past two games with stiffness in his upper back and neck. He didn't run into any problems in the batting cage prior to Friday's game with the Astros and got the OK to start.
Edmonds pinch-hit on Thursday, in his only appearance since coming off the disabled list on Sept. 10. Edmonds, who was acquired from the Brewers for outfielder Chris Dickerson on Aug. 9, was on the DL from Aug. 24 to Sept. 9.
"I'm pretty much back to 100 percent for the first time in a long time," said Edmonds. "The ribs are better and my Achilles is feeling better to run full speed, which I haven't been able to do since June 1. Hopefully I'll get a chance to play tomorrow and see where we go from there."