Even non-football fans couldn't avoid hearing about the slug fest that took place between the Bengals and the Steelers last week end. No one wants to see players get hurt, whether intentionally or not, and the helmets in use these days are probably as good as current technology will allow.
But there may be more work to be done with body protection. DARPA is working on what they call Enhanced Human Operations for military use. So why not apply some of that technology to pro-football?
Put them in Iron Man suits and let them go at it.
NFL -- when MMA is not enough.