It seems likely we'll have 5 WR + Slater on the roster, dress 4 WR + Slater, and use a maximum of 3 WR at one time, most commonly 2. (Because Gronk, Hernandez, and an RB are all likely to be on the field as well.) It seems likely we'll have 3 TEs on the roster, dress 3, and use a maximum of 3 at one time, most commonly 2. Bit of a disparity there. Yes, I know both WRs and OTs can back up TEs; but TEs can also backup WRs. One possible explanation -- the quality of a TE as a receiver is fairly binary, or rather trinary (Gronk, slow guy with great hands, JAG without great hands). But I don't really buy that; e.g., Watson doesn't fit into my trichotomy.