A Georgia Tech football player straight up KNOCKED OUT his teammate during a fight in the GT athletic facility ... and TMZ Sports has the video.
The players are GT starting defensive backs Step Durham and Lance Austin -- who got into a heated altercation earlier this year, before Spring Practice began.
As a shirtless Lance walks towards his teammate, Step ... he gets hit with a quick right hook on the chin -- instantly putting Lance to sleep.
Georgia Tech Football Player KO's Teammate In Training Center Fistfight
TMZ | Nov 28