is it actually possible for a heavyweight to ever be the p4p #1??

[Dave Hughey]

OK. It's not really a guessing game or matter of opinion. Here's the actual mathematical formula used to figure the P4P ratings.

P4P = {(FW - FL) / TF} X WO / WF

Where:

P4P = pound for pound rating
FW = fights won
FL = fights lost
TF = total fights
WO = weight of opponent (at weigh-in)
WF = weight of fighter being rated.

It's designed that way so you don't have to consider weight classes. So of course the heavyweights can be rated pound for pound.

p4p