Jamie Collins was involved in one of the more puzzling trades this year when the Patriots sent him to the Browns.
The linebacker was highly regarded as one of the best at his position, and he was shipped from a championship team to a winless one for a relatively cheap price. Then after he was traded, Bill Belichick shill and former Pats employee Michael Lombardi hopped on radio shows to blast the linebacker's work ethic.
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In short, Collins' final days as a Patriot weren't pretty, so there's a chance he holds a bit of a grudge against the franchise.