Reds put Joey Votto (back strain) on 10-day IL
The move is retroactive to Thursday.
Votto, who last played on Wednesday, is hitting .262 with 12 home runs, 60 runs and 39 RBIs in his 13th season.
To fill his roster spot, the Reds called up outfielder Brian O'Grady from Triple-A Louisville.
It's O'Grady's second stint in the majors after making his debut earlier this month. He went 1-for-5 over five appearances.