It's true that it's hard to put on more muscle when your fats are so low but I think his body is in a state of homeostasis, Its become easier to maintain. I don't know what he's weighing here but I think if he did add more fat to his diet he would be able to add a bit more muscle in the long run.
While that's true, he's too young to look like that on the diet he's been using... unless he were taking AAS. Takes a supraphysiological level of hormones to obtain a supraphysiological physique. He spent years getting to know his body and he's been eating about the same for the last few years. So I don't think there's any other way for him to gain that much mass. He's never been a huge bulker. He just puts on slow, QUALITY, appreciable gains. I think he cycles very sparingly and very intelligently.
This is no knock to his work ethic. This is what I want to emulate. I'm using small cycles and I can finally take a bit of sauce, put on a bit of dense, quality muscle and retain a good amount once I come off. That's what it's all about. A pound of muscle is not just a pound of muscle. It can look like a pound of shitty, watery muscle that will disappear once you're off hormones, or it can be a hard, grainy pound of muscle that will "stick" better once hormones are back to normal.
Some people might think that 190lbs is a tiny tit weight, but then look at a phenomenal physique like J-Rods.. fucking amazing! I'd rather look like that than a bloated mess 90% of the year to only peak at a show and look good 6 weeks out. Either way, J-Rod's endorsed by Palumbo so when he eventually confides to tampering with AAS, I'm sure there will be an easier reception. Most people want a witch burning but they don't realize that every gym rat who's seriously trained for 4 or 5 years eventually uses hormones. If not, they'll virtually stay the same and only make noticeable gains every few years. J-Rod's a genius. Minimal hormone usage, dedicated diet and meticulous planning and observations. Glad he's got a sponsor now.