From the Reds site:
Wily Mo Pena continues a hitting binge with the Louisville Bats while rehabbing a left quadriceps injury. He went 2-for-5 with a pair of RBIs on Friday night while playing right field, and 1-for-4 in the designated hitter slot Saturday afternoon. He was taken out for a pinch-runner Friday night, prompting rumors of a possible setback, but Reds head trainer Mark Mann dismissed the reports, stressing that Pena was fine.