You guys who say he has shit genetics are retards. It's physical inactivity and bad eating behaviors that led him to look like that. He could be a buff endo if he lifted weights. Of course older brother is leaner, more ectomorphic, and christopher is more the endo type, but still, it's all about daily physical activity and nutrition.
Our appearance depends of three factors; genetics, physical activity, nutrition. Last two actually can modify the first parameter to some extent. Get christopher in a gym and on a treadmill, change his eating habits and he could look very good, especially considering he s not bad looking facially speaking. But if he sits in a chair all day long doing nothing like uncle ted and drink himslef into oblivion while eating garbage of course he ll know the same fate as his grandfather.