Dunn is out of the lineup for Wednesday's game against the Padres.
The Reds will give Dunn a breather for the day game after a night game, paving the way for Dane Myers to pick up a start in center field. Dunn had started in all 18 of the Reds' games dating back to May 19, slashing .284/.318/.383 with one home run, three stolen bases, nine runs and four RBI during that stretch.