Croatch, I believe him. He's under 160 pounds. If he was 220 in that exact condition, sure, I'd call bullshit too. But he's under 160. Definitely attainable naturally.
Without commenting on whether this guy is clean or not people should forget about bodyweight for the most part when deciding if someone is clean or not.
There are tons of serious juicers with less muscle than this guy so what does that tell you? Even Jocelyn Pelletier uses gear, perhaps not as much as Kenny Jones, but still.