Tim Duncan gets back tattoo that proves he's a machine

Here's more evidence supporting what most of us already knew: Tim Duncan is a robot.

The retired San Antonio Spurs legend got some fresh ink on his back depicting machine parts underneath his skin.

His friend and popular tattooist Christopher Escobedo shared this photo Thursday:

Duncan had the tattoo started last year, describing it to Bleacher Report as "car part yin yang, mechanical meets spiritual." It covered up a tat he had of a jester.

Never change, TD.

- With h/t to NBC 4 San Antonio