I could see them starting with OT as a test, but I think the sample size would be too statistically insignificant to judge one way or the other whether or not to implement it during regulation too.
Outlawing tackling would make the game a lot safer as well.
Just as many are hurt at the line of scrimmage...
The NFLPA will N E V E R go for this as speacial teams jobs will be lost.
I know am probably pissing in the wind here but how about better helmets and stiffer penalties for helmet to helmet contact? Seems alot simpler than modifying a game that's been around longer than television.
Cheers, K