Which of these is a modified form of baseball played on a smaller field?

Player #76981972, baseball is an adaptation of rounders. rounders came first

A barbecue, perhaps a couple beers, and some good music is nice to set the mood for a weekend softball game amongst friends. We would oftentimes make it a co-ed match, even playing 2 games on a beautiful Southern California day.

As a Brit was looking for rounders in the answer 😅