Bodybuilding and strength training are kinda two different subgenres of weight lifting. Bodybuilding is more about aesthetics (ya know those bodybuilding poses?) and strength training is about just moving sheer weight in the form of squats, deadlifts, cleans, etc.
The way JP has put on weight (both muscle and fat) and his talk about heavy squats points to strength training. It's a very regimented, goal-orientated, exhilarating sport. But in order to keep lifting increasingly heavier amounts, you need to eat a lot (esp protein, hence the salmon jokes). But a tweak in the diet, that fat would be gone, his strength would likely plateau, and he would be ripped.