Here's a link showing different ways a sex-link rooster can be marked. These all have single combs but there are some that have the comb your bird has. I just can't find it through google as of yet...
I still say red Laced Cornish. The comb is the right type. The face has that distinct look that you see in Cornish. The body type is right, those heavy legs, tight hard feathers all say Cornish to me.
Welp Hatchery as a pic of a cornish and he looks really close to it.
Ok now that I think I know what he is. Is it a good roo to have? Never had a cornish before.