The shocking decision by the Dallas Cowboys to trade Micah Parsons to Green Bay after four dominant seasons as a pass rusher is far from unprecedented. A very similar trade happened on the eve of the 2018 season when the Oakland Raiders shipped two-time All-Pro and one-time Defensive Player of the Year winner Khalil Mack to Chicago . Both trades happened after failed contract talks and featured two first-round picks in return, although Dallas also got defensive tackle Kenny Clark from the Packers. That 2018 trade didn't ultimately work out for either team. Mack was highly productive in Chicago, earning All-Pro honors his first year, but couldn't do enough to help the Bears win a playoff game in his four seasons before being traded to the Chargers. The Raiders used the first pick on running

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