Fighters that smoked or drank or did drugs

[Forza]

I'll start with a few ones off the top of my head

Mayorga: heavy smoker
ODLH: drank, did cocaine
locche: chain smoker
Graziano: smoke/drank
Tapia: Drank, did lots of cocaine, possibly other drugs
Tyson: Drank, cocaine, marijuana
Duran: Drank A LOT

[Oasis_Lad]

Scott Harrison: Alcoholic. Drug Taker.

[Steak]

Benitez apparently did a lot of drugs and rarely trained for fights. Ive heard stories that McCall was a real bad substance abuser. JCC drank a lot as well.

[goblin213]

Monzon and Elorde were chain smokers.

[New England]

arturo gatti
michael nunn
late period whitaker
edwin valero
kelly pavlik
ray robinson


and apparently oscar de la hoya has a serious problem with drinking and womens clothing

[Miburo]

Monzon is, by far, the all time king.

[NChristo]

Most 1980's heavyweights.
Young Griffo was a raving alcoholic
Esteban DeJesus and Mike Ayala did heroin
Jose Napoles, Carlos Ortiz, Jake LaMotta, Sonny Liston, Arturo Gatti and Diego Corrales were heavy drinkers
Rocky Lockridge, Michael Nunn, Pernell Whitaker, Edwin Rosario, Macho Camacho, Aaron Pryor, Alexis Arguello, Ray Leonard and Frankie Randall did Coke.

[Sugarj]

Johnny Bredahl was a heavy smoker.

[IronDanHamza]

Most 1980's heavyweights.
Young Griffo was a raving alcoholic
Esteban DeJesus and Mike Ayala did heroin
Jose Napoles, Carlos Ortiz, Jake LaMotta, Sonny Liston, Arturo Gatti and Diego Corrales were heavy drinkers
Rocky Lockridge, Michael Nunn, Pernell Whitaker, Edwin Rosario, Macho Camacho, Aaron Pryor, Alexis Arguello, Ray Leonard and Frankie Randall did Coke.

That's the first person who came to my mind.

[SBleeder]

Monzon is, by far, the all time king.

At least Monzon didn't smoke between rounds like Locche!

Actually kind of ticks me off. Locche's my favorite fighter of all time and I really think he had GOAT potential, but for his terrible discipline with food and smoking.