Phillips was surprised when he came into the clubhouse and saw he wasn't starting, immediately going into manager Dusty Baker's office. Baker explained his decision was simply based on the weather, which had temperatures in the mid-40s, with cold and wet conditions.
"With this weather like it is and this wind blowing, that tightens your hamstrings up, big time," Baker said. "If you have one long inning, or with the wet conditions you slip on the infield or the wet grass or going back on the ball ... it's best for him."
Willie Harris started at second base in place of Phillips, batting seventh.
Phillips has admitted he's been playing at about 60 percent since returning to the lineup Sunday. He originally injured his hamstring on April 9 and missed five starts.
Baker said Phillips didn't tell him how he was feeling Friday, but he said the second baseman continues to get treatment. Phillips did say after Thursday's 6-3 win over the Cardinals that his leg "is feeling so much better."
"Sometimes as the manager, you've got to supersede whatever they say and do what you think is best for the ballclub," Baker said. "If it was any worse, he would say, but this is not a good day to be playing if something's wrong."