Phillips declined comment before the game, but manager Dusty Baker said his second baseman had been cleared to play.
"Brandon knows how to program himself, he knows his body," Baker said. "You always are going to take a chance. You take a chance every day you go out there."
Phillips injured the leg on Tuesday night against San Diego. He had been scheduled to start on Saturday, but he was scratched shortly before game time.
"He's been driving us crazy wanting to play," Baker said. "You know you've got to try him some time. He's been doing well."
Entering Monday, Phillips was batting .296 with 13 home runs and 62 RBIs this season and has been an instrumental part of the Reds' offense in the absence of Joey Votto, hitting .339 with three homers and 13 RBIs since Votto left the lineup.