... wear pads and helmets.  But sometimes all that equipment still isn't enough to protect players from each other. 

Some guys just push the violence a little too far.  They draw penalties and get branded by opposing players and coaches as "dirty."  Throughout the history of the game, there were lots of players who would be fined, penalized, and ejected from the league.  But back in the day, it was perfectly acceptable to head-slap an offensive lineman (Deacon Jones's patented move, later banned).  In the early Super Bowl era, "dirty" by today's standard was the norm.  There was no offensive PI.  Contact after 5 yards?  No problem, as long as the ball wasn't in the air.  The game was more ph...

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