Somehow the steel on the skate is bent (front to back). Just slightly. You can barely see it with your eye. I was only able to confirm this was the case when I put a straight edge against the side of the blade. The inside edge towards the middle was gone and I just assumed he stepped on something. So we had them sharpened again...same thing...sharpen...same thing. Now I know something is odd. That's when I figured out it was bent.
This is on my son's skates, CCM size 4.5. He plays PWAA so he is a competitive skater, but doesn't have the weight and impact of an adult player.
Any idea how something like this happens? Sure it could have happened during a game, but I would have thought for him to have hit something hard enough you would see some sort of evidence. Puck mark on the blade holder, chip in the blade, etc. Someone suggested heat from being left in the trunk of the car, but that seems like a stretch.