The 33-year-old played three rehab games before being activated.
Before he went on the disabled list, Phillips was hitting .272 with seven home runs and 40 RBI in 86 games. He is a three-time All-Star and four-time Gold Glove Award winner.
Cincinnati is 61-63 and sits in fourth place in the NL Central, 8.5 games behind the division-leading Brewers.
- Molly Geary