During his playing days with Phoenix, Amar'e Stoudemire was a force to be reckoned with in the paint mainly on the offensive end. Paired with Steve Nash, Amar'e flourished offensively but never was a great defender.
One would think at his size, and athletic prowess, he be a tad better defensively but in the following video, it is safe to say he still has yet to play on both ends of the court.
In a recent game versus the Knicks, Amar'e got absolutely lost on defense which led to an easy bucket for the Pistons.
Check out Amar'e's "stellar" defense.