I don't know who did this, but I suspect nothing that matters has changed.

There are many possibilities. Here's an example of one. I knew a wrestler who in college had a serious leg injury, and after it healed he went back to wrestling. It became a target for his competition. As soon as he figured that out, he used it to his advantage. He said he would act like he was protecting the leg, and when people went after it, they would inevitably make a mistake and he would use that to win the match.