League has the same zero tolerance policy as union. Though union players seem way beefier and move way slower on the field, so an impact that knocks someone down looks far more dangerous than in league. League players seem fast enough to dodge most impacts. But yea, I think in almost every game I've watched, there's almost always someone getting a headknock that they pull out for an assessment.

It could be that I’m focusing more on Union than League. I’m on the bus and searchability is limited, the example I was going to give (https://youtu.be/JjLIetqAP6U) is Union :)