I'm going to take a different tack. Davis left the game with a concussion and if you look at the replay you will note that he did not get a concussion from hitting his head on the field. The game has changed and will continue to change. Players risking their lives (long-term) for our entertainment reminds me a lot of the Christians vs. the Lions. Wrong then, wrong now.
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"You're not a g*dda*n looney Martini, you're a fisherman"

R.P. McMurphy - One Flew Over The Cuckoo's Nest