The NFL historically was one of the later American sports leagues to get unrestricted free agency, with it finally happening in 1993 after many long legal and labor disputes.
If free agency under the ultimate post-1993 rules (4 years on a pro roster, expired contract) occurred at the same time baseballs did in the mid 70s, how would that change the development of the NFL?
If free agency under the ultimate post-1993 rules (4 years on a pro roster, expired contract) occurred at the same time baseballs did in the mid 70s, how would that change the development of the NFL?