For many years in the NFL, trading during the season was an afterthought. We went many years without a significant deal before the deadline.
That has changed the past decade or so. Teams are more willing to ship off players at or near the deadline, usually when they understand their season is going nowhere and it's best to grab some future draft picks.
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With the trade deadline coming up on Tuesday, here are the 12 biggest in-season trades in NFL history: