There are players in the NFL who simply know their role. Anything they’re asked to do in one capacity, such as Chicago Bears special teams gunner, Sherrick McManis, they excel. When pushed outside of those parameters into traditional means, such as on the defensive back-end, you receive less than ample results.
In seven NFL seasons, that’s the best way to describe McManis: a quality special teamer who can be considered a real asset on said unit, but abhorrent otherwise when pressed in on defense. With arguably better depth and talent, the Bears have to hope they don’t have to do see McManis in an uncomfortable position again.