Word for word from Peet -
"he's almost 20 kilos heavier than he was this time last year, which is amazing. That's partly through training, but partly just his maturation as an athlete and as a bloke"
I wouldn't say he has put 20kg's on in 1 pre season, it is from this time last year so he probably put some muscle on playing against full grown men every week, natural growth as he is still young and then whatever he has put on through conditioning in this pre season. I imagine it is a combination of all 3.
Still scary (in a good way) that he is that much more of a bulk than he was at the beginning of last year and when he first broke through in 2023. I don't see what Peet would gain by lying or bending the truth about it though, he has no need to lie about Nsemba's size it already speaks for itself!