You often hear how Joe Riggs once fought at Superheavyweight. Makes one wonder how low could a dedicated, strict diet, Roy Nelson have fought at.
He probably has 60+ plus pounds of fat. So that takes him to below 205 before any serious training. Probably lose another 10-15 by training alone. Could he have then cut down to WW?
Joe Riggs did it. There have been others who were slobs at HW and eventually fought at MW and below. Given this Roy Nelson at 170 is not crazy albeit when he was younger (probably harder to cut at his current age).
Atomweight
-Mike Dolce 
But seriously, given his age and the time and dedication it would take to get to a lighter weight and still be competitive, I don't think he goes below 205. If he was in his mid twenties or early thirties, maybe middleweight. He'd have to be featured on My 600 lb Life to make welterweight
The gut is where he derrives his power.
In all seriousness, recent permormances suggest he really needs to be in better shape if he ever wants to beat higher ranked HWs.
Not sure if dropping weight classes is the answer and don't think he'll ever be champ at 265lbs, but I can't help but feel he would beat the Rothwells and Mirs of the heavyweight division if he took his training more seriously. 
At this point in his career? Maybe 238?
170 (according to Rousey fans)
He can lose 50lbs if he just cut that fuken hair and beard. Jesus Christ. Hasn't anyone told him that it's horrible and even worse when he braids that shit?
125
Dead President - He can lose 50lbs if he just cut that fuken hair and beard. Jesus Christ. Hasn't anyone told him that it's horrible and even worse when he braids that shit?Roy is an anti-hero, a rebel... thats why he has so many fans. Many can relate to him.
Dana said many times he should lose weight, cut beard and mullet but Roy just makes a point of going the other direction and laugh at it.
Iirc he did say last year that he was trimming down and for 1 fight it looked like he did (cant remenber which one) but fell into old habits again.
With his KOs and Renzo bb he could have been in title contention at mw if he was lean imo
Toquinho -Dead President - He can lose 50lbs if he just cut that fuken hair and beard. Jesus Christ. Hasn't anyone told him that it's horrible and even worse when he braids that shit?Roy is an anti-hero, a rebel... thats why he has so many fans. Many can relate to him.
Dana said many times he should lose weight, cut beard and mullet but Roy just makes a point of going the other direction and laugh at it.
Iirc he did say last year that he was trimming down and for 1 fight it looked like he did (cant remenber which one) but fell into old habits again.
With his KOs and Renzo bb he could have been in title contention at mw if he was lean imo
that was when PEDS were rampage. Now with the new testing you see fat HW's appearing. i don't see Dana repeating his statement.
HW is where his power is at.
it didnt work for Igor V to drop weight when he did.
Toquinho -Was gonna say the same about him being a contender, surprises me to this day how little he uses his BJJ, he seems to just want the highlight reel KO when really his gas tank doesn't allow him to punch fast enough to land one after round 1. Woulda loved to see Roy at 205 and using his BJJ moreDead President - He can lose 50lbs if he just cut that fuken hair and beard. Jesus Christ. Hasn't anyone told him that it's horrible and even worse when he braids that shit?Roy is an anti-hero, a rebel... thats why he has so many fans. Many can relate to him.
Dana said many times he should lose weight, cut beard and mullet but Roy just makes a point of going the other direction and laugh at it.
Iirc he did say last year that he was trimming down and for 1 fight it looked like he did (cant remenber which one) but fell into old habits again.
With his KOs and Renzo bb he could have been in title contention at mw if he was lean imo
Never gonna happen.
240
265
i think he could get to LHW cutting shape (220ish) but not fighting at Heavyweight is a disadvantage i would think