Phil Mackey, Judd Zulgad and Manny Hill dissect perhaps the most prominent trade in NFL history — a trade on Oct. 12, 1989 that sent Herschel Walker from the Dallas Cowboys to the Minnesota Vikings for what wound up being a HAUL of top draft picks. What impact did this trade have on the Vikings? On the NFL? And what would have happened if the Vikings held onto those draft picks?
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