User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170410043119/@comment-10330822-20170411001041

Well, the thing is, Yamcha is not that bad in relevance to other people, just the Z fighters.

Yamcha, in reality, is probably one of the top 3-4 humans on the planet, his strong enough to fly freely wherever he needs to, and he had a successful career as a baseball.

In short, out of all of them, he had the most ease of transitioning from fighting to a normal life.

So, just like that. Saji is pretty good, relative to "normal" people, and you could say he just lags behind, but its some serious lag. Its like he's still in Volume 5 when Issei is in Volume 23. Just like how Yamcha is just getting to gravity training while Goku is literally becoming a God.