NY Giants star Xavier McKinney plays on the gridiron like a comic book villain ... and now, after getting a huge torso tattoo, his stomach art matches his game!!
The 24-year-old recently hit up LeBron James' ink artist, Ganga, for the piece ... and it turned out awesome.
His abs are now covered by an image of a pissed-off Thanos ruling over a smoldering city. On one of his obliques, meanhwile, he got a pic of the Joker put down -- and on the other, Ganga drew on "Guardians Of the Galaxy" character Groot.