1. Herschel Walker
This remains the most one-sided and worst trade in NFL history. Walker was phenomenal for the Cowboys. This convinced the Vikings that he was the missing piece to help them win a Super Bowl. However, Minnesota should accept that they’re never going to win a ring. That’s because Walker’s form immediately dissolved after he arrived in a blockbuster trade. 18 players switched in this chaotic deal.
Meanwhile, Minnesota gave up everything to bring him North. Dallas received a pair of first-round picks and three second-round picks. Oh, and the Vikings also threw in a third-rounder for good measure. Walker stayed in Minnesota for two seasons without posting 1,000 yards. Then, the Cowboys won three Super Bowls in the space of four years when they built a dynasty off of the insane haul the Vikings had signed off on (via Fanbuzz).