Very much not unprecedented in sport in general. Mostly heard about it in kids’ playing baseball.

So, I remembered a news report from when I was a kid in, like, 1991 about Commotio Cordis happening a lot in Peewee Baseball and lo, they haven’t really done much about it taking out kids in little league sports:

https://99baseballs.com/health/heart-protection-for-youth-baseball-players/