Loma has narrow shoulders and so did Pac. Also Pac had very narrow torso and waist area. And by the way Pac is 5'5" on a good day. Pac is a former Flyweight FFS.
Loma is more athletic than Marquez, but nowhere near as physically powerful. Marquez could ****en bang. Marquez also had a powerful looking upper body. Freakish shoulders and back for a 5'7" Featherweight.
How is your point relevant to the size of Manny Pacquiao? I could weight a lot more than I do right now. It's actually very simple. I could just eat more food.
What's your point? I weigh about 200lbs right now but I was about 180 a couple of years ago. To be perfectly honest I wish I was about 175 and I'm planning on getting back down to that weight sometime.
The overall point is that the number on the scale doesn't determine how naturally large your frame is. The weight is just an expression of how many calories your body consumes and burns.
Pacquiao weighed 147 when he fought at 135 and Loma only weighed 138. But Pacroid started juicing like crazy when he moved up from 130, hence why his head ballooned to the size of a car park.
Loma could weigh 147 as well on fight night if he chose to eat more food. Pacquiao made a commitment to going into the higher weight classes by adding more weight to his body. It's up to Loma to decide if he wants to do that himself. The extra weight actually did slow Pac down. Compare his speed at 147 to 126, it's night and day. But he had a goal and that was to conquer the Welterweight division and destroy Hatton, DLH and Cotto.
Yes he is small, thus any victory at that weight class against champs amplifies his legacy and resume.
You dont need steroids to eat more food. But if Loma is serious about fighting in the higher weight classes I think he would benefit from gaining more weight.
But if he gained weight Papachecko might leave him and start training other fighters instead, though.