As an image of “baseball boy” or “naughty boy”.
KATSUO of comic “Sazae-san” is drawn as a stereotyped “naughty boy” in Japan.
The basic style when KATSUO goes out to play outside is “Bat with a baseball cap”, and of course he play “baseball” to do in vacant lots.
However, in modern times, it seems that there are more boys who play “soccer on lawn” than “baseball in vacant land”.
This is one reason why Sazae-san is said to be anachronistic.