The player in the big nickel, in Green Bay’s case, Micah Hyde and Sean Richardson, is suppose to line up against slot receivers and tight ends. The bigger body player is used to defend against the increasingly large numbers of NBA styled tight ends in the NFL while having the speed and agility to cover slot receivers.
On top of it, in certain blitz packages, the nickel-back will also take on a linebacker role and rush from the edge. We could see Hyde’s role as a pass rusher increase this year after taking just 24 snaps as a pass rusher last season.
PackersTalk  wrote: