Rocky lost a fight BEFORE he was even amateur, in Brockton, Mass to a black guy. It was like some local boxing club/gym. Marciano had thrown all his punches--about 250 they say--in the 1st 3 rounds and was totally punched-out. So knowing he would get knocked out, he kneed the poor guy in the balls, and ran out of the ring into the street. At that time he may have been 23 years old. I think he quit boxing for a year or 2 after that, and tried out for the Chicago Cubs. So that's a DQ. But I dont think that counts