Buff Brahma could account for the comb, but not the clean legs & feet. (Most feathered feet are caused by dominant genes, so feather-footed parents usually produce feather-footed offspring.)Any chance dad is a Buff Brahma, or at least has some in the mix? I have a Buff Brahma and Buff Orpington mix hen, she's our biggest bird currently. Just a thought based off the comb observation.
I agree with nicalandia that a "Buff Orpington" with a really small comb, who produces a son with a pea comb, is probably a Buff Chantecler instead. (Buff Cornish could also be a possibility, but I think less likely. They're even rarer than Chanteclers, and have a different body shape that would probably have been obvious to the OP.)