He is batting cleanup and playing first base in Tuesday night's game at Great American Ball Park against the Milwaukee Brewers.
He just completed a rehabilitation assignment at Triple-A Louisville, and the team said he was able to catch throws at first base with minimal soreness.
Votto, a former National League MVP and six-time All-Star, is hitting .226 with five home runs and 17 RBIs in 29 games this season.
The Reds placed right-hander Michael Feliz (elbow) on the 10-day injured list in a corresponding move, which was made retroactive to Monday.
The Associated Press contributed to this report.