Rob Gronkowski admits to having nearly 20 concussions blacking out five times in his NFL career with Patriots

Rob Gronkowski should thoroughly reconsider even flirting with the idea of a potentially making an NFL comeback. There's little doubt the former tight end has made a strong enough case to one day land in the Pro Football Hall of Fame, but he's made a comment or two this offseason following his decision to retire from the NFL that leaves many wonder

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