When the N.C.A.A. introduced the free substitution rule for football back in 1941, the theory was that more boys would be able to play, injuries would be reduced and smaller colleges would get a chance to make the best use of their football talent. In practice, things worked out just the opposite. More boys played, but they became the robot-like specialists of the two-platoon system; injuries increased because the players never got a chance to warm up again after riding the bench; and more than 50 colleges quit football because they had neither the...
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