Jarrell Miller: natty or not?
Confirmed "Big Baby" — the heavyweight who lost an Anthony Joshua title shot to three failed tests
Short answer. Verdict: confirmed. At the peak physique on this page, Jarrell Miller is 6'4" (193 cm) and 320 lbs (145 kg) at roughly 25% body fat. That works out to an FFMI of 28.4, against the ~25 mark cited as the natural ceiling.
The numbers (estimated)
| Peak physique | Heavyweight fighting weight; he has weighed as much as 341 lbs |
|---|---|
| Height | 6'4" (193 cm) |
| Weight | 320 lbs (145 kg) |
| Body fat | ~25% |
| FFMI | 28.4 — ~25 is the cited natural ceiling |
Era by era (estimated)
| Era | Year | Age | Weight | Evidence | Body fat | FFMI |
|---|---|---|---|---|---|---|
| The cancelled Joshua fight | 2019 | 31 | 315 lbs (143 kg) | reported | ~25% | 28.0 |
| Heaviest recorded weigh-in | 2022 | 34 | 342 lbs (155 kg) | reported | ~28% | 29.2 |
FFMI over time (estimated)
FFMI per era (values in the table above). Hover a point for details.
Note. Fighting weights are weigh-in figures; body-fat numbers are estimates. The verdict is not — it rests on repeated positive tests and two commission rulings. See the methodology page for how we judge.
Jarrell Miller had a heavyweight title fight against Anthony Joshua at Madison Square Garden. He lost it to a laboratory.
In 2019 he failed pre-fight testing for GW501516, EPO and HGH. New York denied his licence — the only sanction available to it — and the WBA banned him six months and stripped his ranking. In June 2020 he failed again for GW501516; Nevada suspended him 24 months, and he was not licensed again until November 2022. Before either, in 2014, California suspended him nine months after a kickboxing bout for methylhexaneamine.
Confirmed, repeatedly, across three commissions.
What he said
His account: “I have never, ever willingly taken a steroid for performance-enhancing purposes. Did I take something for healing properties, for injuries? Yes, I have.” He later attributed one result to a sexual performance pill.
Note the shape of that sentence, because it recurs on this site: the denial is about intent, not about the substance. Nobody disputes what was in the sample.
The numbers
Miller is a genuinely huge man — as heavy as 341¾ lbs at a 2022 weigh-in — and carries obvious body fat. He is the opposite of the shredded physique people associate with steroid use, which is the point worth taking from this page. GW501516 and EPO are endurance drugs. They do not make a man look like anything.
Verdict
Confirmed — three separate positive findings, two commission suspensions, and a licence denial. His own explanation concedes taking things and disputes only why.
In their words
“I have never, ever willingly taken a steroid for performance-enhancing purposes. Did I take something for healing properties, for injuries? Yes, I have.”
Common questions
Is Jarrell Miller natty or on steroids?
This site rates Jarrell Miller as confirmed, the only verdict here stated as fact. It takes an admission, a failed test or an official record, and the one behind this page is cited in the sources below.
Has Jarrell Miller ever failed a drug test or admitted to using PEDs?
The record that settles this page is listed in the sources below and described in the article above. It is what makes the verdict confirmed rather than an opinion.
What is Jarrell Miller's FFMI?
About 28.4. That comes from 6'4" (193 cm) and 320 lbs (145 kg) at roughly 25% body fat, normalized to 1.8 m. Drug-free lifters in the Kouri 1995 study topped out near 25.