Yeah, it was always called box ball in my iteration and was a big part of every inner city kid's life. I grew up in one of those red brick housing projects with lots of windowless walls. It was perfect. You'd see a dozen games going on all the time. BTW- it was a great game for 8 year olds and we were still playing it in HS. Usually played with 2 kids on a side (pitcher and fielder) caught ground balls were outs as well as flies. Over the head of the fielder was a homer.
Other games the I remember:
flipping baseball cards against the wall, with nearest wins (leaners were the ultimate)
Marbles for keepies
Billy Buck Buck - That was a tough one. One team would line up and interlock hugging each other, while the other team would send individuals to vault on the line and try to break it. You won if all their players leaped and the line held. You lost if the line broke or one of you players didn't stay on the line. I have one indelible memory of that game over 60 years later.
Usually the team anchored on something like a tree or pole. Well I had a particularly good run and well timed hand placement, and vaulted head first right into the tree. Probably my first concussion.
But you are right, you were NEVER in the house after school. You got home, changed into "play clothes" and you were outside doing something. Growing up in a housing project was great as far as I was concerned. If you were with anything less then 8 other kids, you were essentially alone. It was only years later did I find out I was "poor". It came as a surprise because I thought I had never lacked for anything....mostly I guess because you didn't need much to have fun in those days.