I looked at the 2015 numbers real quick. I also assumed McCarron started the week 13 game, just for easier math.
2015 Andy Dalton:
12 Games, 66.1% Completions, 8.38 YPA, 266 YPG, 6.56% TD%, 1.57% INT%
2015 AJ McCarron:
5 Games, 63.5% Completions, 6.69 YPA, 209 YPG, 4.49% TD%, 1.92% INT%
Hoping for even Dalton-like production out of McCarron is still a stretch, imo.