Bigger and Faster
During the 70's and early 80's, linemen on both sides of the ball weighed between 260 and 280 lbs. Moreover, they were slower. Today these linemen weigh in at 295, 320 to 340 lbs. Some of them can be as heavy as 360 lbs. Unlike linemen of the past, these linemen are more muscular and faster.
Mass multiplied with velocity equals force. Lighter slower players hit hard, but not as hard as heavier, faster players. This is why the rules of the 70's can't be used in today's game. Imagine a DE such as Dwight Freeney today allowed to hit a QB like Joe Greene did in his prime. Tom Brady's career wouldn't last very long.
Maurice
The Electric Coach
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