My son played soccer as a kid and through high school, and then hockey from middle school through high school. I know all about concussions. After his third, he stopped playing. He still skates but not competitively. Same with soccer. He knows his brain has to last for another 50 years, if I have my say in it. He’s a decent chef, great bartender, and musician. And an all around nice guy. I often wish these guys would quit while they’re ahead. Money and fame ain’t everything.
Good luck to him- hope he’s successful at whatever he chooses