The suspension length is slightly shorter than the original three-game suspension the rookie was levied after his contact with home-plate umpire Chad Fairchild during a July 30 argument over balls and strikes.
"They didn't hear the appeal. They just knocked off a day," Mesoraco said. "I would've liked to have gone through the appeal process myself. But we decided that this was probably the best thing to do, and we went forward with it."
Mesoraco might have had a good case for his appeal since, one inning before his incident with Fairchild during a game vs. the Padres, he suffered a concussion in a plate collision with Cameron Maybin.
"This is what the team thought and my agent decided was the best," Mesoraco said of the decision to not appeal. "At the end of the day, I didn't want to hurt the team. It's whatever the team wants to do. The least amount of hurt that we can do, I'm all for that."
The Reds will have to play short with 24 men on the roster but didn't want to risk having only one catcher for two days. They recalled catcher Dioner Navarro from Triple-A Louisville and optioned reliever Logan Ondrusek to Louisville.
"It's the lesser of two evils -- three days vs. two, which is big in the overall equation, especially in the moves we had to make to accommodate the suspension," Reds manager Dusty Baker said.
Mesoraco, who is batting .210 with five home runs and 14 RBIs in 52 games, is the regular catcher for Mike Leake and Homer Bailey. With Bailey starting vs. the Phillies on Tuesday, the Reds started primary catcher Ryan Hanigan.
While he is suspended, Mesoraco is allowed to work out, take batting practice and be in the clubhouse before the game. He must leave before first pitch, however. Mesoraco planned to watch Tuesday's and Wednesday's games on television somewhere away from Citizens Bank Park.
"Looking back, obviously, it's not something I'll do again," Mesoraco said. "I never thought of doing it at the time. It was a reaction, accidental thing. It turned into something else, something I didn't want to happen with the suspension and everything. I messed up. We'll just move on from there."