This is offered as a solution a lot, but I am not sure if it would actually be effective. Football helmets were introduce early in the 20th century because dozens of people were dying every year playing football. Football helmets put an end to those deaths caused by acute trauma, but the physics of the game and those collisions haven't changed. Football is just a more violent game than Rugby due to various reasons like position specialization, more frequent stoppages of play, and the inherent directions of play for the offense and defense. It is rare to have two players in rugby running full speed at each other head on. That happens in football on nearly every play and often multiple times per play.
Source: https://medium.com/upstart-magazine/nfl-vs-afl-injury-compar...
Helmets enable players to weaponize their heads, like this recent hit (Vontaze Burfict's suspension earning HIT on Anthony Sherman): https://www.youtube.com/watch?v=_7qQtadYqsI and many others demonstrate. I believe removing helmets would mitigate this behaviour and increase the long term health of football players. Looking for data on Aussie rules, this is not quite what I was hoping to find, but interesting: https://en.wikipedia.org/wiki/List_of_Australian_rules_footb...
Without question Aussie rules has its share of devastating brain injuries: https://www.youtube.com/watch?v=s1aU0hz5Tf8. Plenty of concussions and fencing responses in that clip.
At 33, I've stopped watching North American football altogether because the violence turned me off. 10 years ago it was my second fav sports (to Hockey).
WRs for example have a somewhat similar situation to AFL players since they are mostly being chased by the defense and they don't get nearly as many contact injuries as RBs for example. Not to mention they are protected by (frequently controversial) pass interference rules.
From what I gather, introduction of the helmets back in the day reduced injury rates.
You could bubble wrap the jar (helmet), but the ball will still collide with the inside of the jar.
When they run towards each other, due to the rules, they don't just try and collide and call it a "tackle". I agree football is a more violent game intentionally but it's purely how the game is played and if you change the rules you'd have teams finding ways to play differently, with different skillsets prioritised.
However, much as we aussies like to mock gridiron for the pads it requires, without the pads, players used to die relatively routinely. Take the pads away from gridiron and it would need to change and loosen up enough that it basically becomes rugby.
But I'm not sure American broadcasters could adjust to a game with only two halfs of 40min each, no stopping of the clock and nowhere to stuff their abundance of ads.
I wouldn't mock the Americans too much for their famous love of advertising. I haven't found a sport yet that is as much a slave to advertising as Aussie Rules. Try to find a square meter of space[1] at an AFL game without advertising - even the ball itself is adorned with the golden arches.
[1] Okay, some of the grass doesn't have advertising on it.....
The huge and essential difference is that in gridiron the players in the 'scrum' start ~2m appart and run towards each other head first at full speed. And while most players in rugby can go several plays without taking a hit, linemen take a significant hit basically every single play.