According to offensive coordinator Hue Jackson, the quarterback shouldn't be in them for too long.
"He's just a little sore right now," Jackson said. "We'll get him back as fast as we can."
Jackson added there was a belief that McCarron would be back "soon."
It's unclear for now what exactly happened to McCarron. His absence came after he participated in the Bengals' practice Monday. Although fellow backup Josh Johnson got a large share of snaps in Monday's workout, it didn't appear that McCarron did anything to warrant the missed time.
Jackson didn't have an answer when asked if McCarron's apparently injury might cost him playing opportunities in Friday's preseason opener against the Giants.
"We'll figure it out and move on," Jackson said.
Preseason openers are typically good games for No. 2 and No. 3 quarterbacks like McCarron and Johnson because they get extensive work in them. Teams in those games also are trying to keep their starters as fresh as possible for the regular season, and likely won't use them much. So expect Andy Dalton to maybe only get one drive Friday night. Any more than two would be a surprise.
If McCarron can't play Friday, Johnson and fourth-string quarterback Keith Wenning may end up having a couple extra series than they may have originally anticipated.