The lucky NY Giants fan who got Baker Mayfield's 1st-ever touchdown pass Thursday night -- THREW IT BACK ON THE FIELD ... and the whole thing is on video.
Baker hit Cleveland Browns tight end David Njoku for a 10-yard strike in the 2nd quarter -- and Njoku tried to gift the ball to a fan in the end zone.
But, the fan wasn't a Browns supporter -- or a fan of money -- because he took the valuable pigskin and fired it right back onto the field in disgust .