"At least I know I can get into squat position, which I hadn't done for 30-something days," Mesoraco said. "It's good. Definitely baby steps. We're not going to go crazy because those muscles haven't been used. It's going to be a slow process."
Mesoraco said he will do "more of the same" on Wednesday. The Reds have an off-day on Thursday before opening a three-game series against the Indians on Friday night at Progressive Field.
"Once we get to Cleveland, I would imagine I'll catch a bullpen one of the days there," Mesoraco said.
Mesoraco served as the designated hitter on Tuesday against the Royals.
• Left-hander Manny Parra, who has been on the disabled list with a strained neck, began a rehab assignment on Tuesday by striking out the side in a one-inning stint for Triple-A Louisville against Norfolk.
• The Reds-Cubs rainout on April 25 has been rescheduled as part of a day/night doubleheader on July 22. The games will begin at 12:35 and 6:10 p.m ET.
Robert Falkoff is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.