"I strained something in my hand. I'm going to see the doctor," Hanigan said. "I did it swinging, [Sunday]."
This season, Hanigan is batting .196 with two home runs and 14 RBIs in 45 games. He already missed time on the disabled list from April 21-May 10 with a strained left oblique and a sore right thumb.
"Hopefully it's not too bad," Reds manager Dusty Baker said.
Mesoraco hasn't been 100 percent himself, as he missed the past two games with back spasms. It was clear he was still laboring with discomfort throughout the Reds' 4-3 loss to Milwaukee on Monday night. On one groundout to the shortstop in the second inning, he was only able to jog slowly to first base.
"Sometimes you've got to grind. Mes said he was OK," Baker said. "We kept watching him. We didn't have Hanigan today and [third baseman] Jack Hannahan was my backup catcher. That's why we couldn't use him at any time to pinch-hit or put him in the game. I was just hoping Mes could get through the game. He's a tough guy. I don't know what we're going to do tomorrow. I don't know if he's going to be all right or not. The docs are putting hands on him, treating him and we'll see."
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.