cue the "well the NFLPA gave him the right" but doesn't Goody Goodell actually have to have evidence that Zeke did something, not just her word, does he not have to seek some kind of corroboration (and a medical report which has no weight is not really corroboration) and stating that he didn't disprove he did means he did, even if as many internet lawyers in this thread like to say this is not criminal but civil, goes against all principles of natural justice. Even if a civil case, you do not have to disprove a claim brought against you.
Goody Goodell has decided that you have to disprove a claim against you. You cannot prove a negative so basically he has decided as long as he believes it, even if there is no evidence, he can do what he wants.