New York Giants star Nick Gates suffered a horrific leg injury Thursday night ... and it was so bad, he said afterward that he "snapped that s*** in half."
The offensive lineman -- who had just been named a Giants captain for the season -- was attempting to block for Daniel Jones in the first quarter of NY's loss to Washington, when his leg got rolled up on from behind.
In footage of the play, you can see a WFT defender landed right on the back of his leg .